Design-in guide - Philips Lighting

Design-in guide 

Philips Fortimo LED Twistable Downlight Module (TDLM) Gen 2 

1100 lm and 2000 lm 120 VAC modules

Contents 

Introduction 3 

Information and support 3 

Introduction to the Fortimo LED Twistable DLM Module Gen 2 4 

Applications 4 

Product description 4 

Classification 4 

About the module 4 

Generation 2 5 

LEDs powering Fortimo LED Twistable DLM Module Gen 2 6 

What is LED? 6 

LED packaging 7 

Binning 7 

Mid-power LED 7 

Miniaturization 7 

Important recommendations and warnings 8 

Design-in phase 8 

Design-in and manufacturing phase 8 

Module replaceability 8 

Warnings 8 

Mechanical characteristics 9 

Mechanical construction of the Fortimo LED Twistable 

DLM Module Gen 2 9 

Dimensions of the Fortimo LED Twistable 

DLM Module Gen 2 range 9 

Dimensions of the BJB lampholders 10 

Dimensions of the Stucchi lampholders 10 

Dimensions of the Ideal lampholders 11 

Lighting characteristics 12 

Light distribution 12 

Optical files 12 

Spectral light distribution diagram 1100 lm 13 

Spectral light distribution diagram 2000 lm 13 

Polar intensity diagram 1100 lm 14 

Polar intensity diagram 2000 lm 14 

Colour consistency (SDCM) 15 

Reflector design 15 

Thermal management 16 

Operating temperatures 16 

Test requirements 16 

Maximum Temperature 16 

Critical measurements Tc point 16 

Case temperature 17 

Twistable with closed heat sink 17 

Twistable with open heat sink 17 

Operation under built-in conditions 18 

Thermal interface 18 

Heatsink design 18 

Thermal Conductivity 19 

Emission 19 

Thermal de-rating system 19 

Size of heatsink & Thermal Interface Material 19 

Air flow 20 

Thermal model 20 

Analogy between electrical and thermal resistance 20 

Calculating your heat sink 21 

Available information 21 

Heat sink complementary partners 21 

Electrical design 22 

Wiring 22 

Length of mains cable 22 

Starting characteristics 22 

Low and overvoltage 22 

Inrush current 2 22 

Dimming 23 

Switching 23 

Quality 24 

Compliance and approval marks 24 

Sustainability 24 

Conditions of acceptance 24 

IP rating, humidity and condensation 24 

Energy Star 24 

Titlke 24 24 

EMC 24 

Sustainability 25 

During operation 25 

System disposal 25 

Contact Details 25 

2 Design In Guide Philips Fortimo LED Twistable Downlight Module Gen 2

Introduction 

Thank you for choosing the Philips Fortimo LED Twistable Downlight Module (TDLM) 

Gen 2. In this guide you will find the information required to design this module into a 

luminaire, plus valuable hints and tips. 

The product specifications and information regarding the products in this document 

are subject to change without notice. All statements, information, and recommendations 

in this document are believed to be accurate but are presented “as-is”. Without any 

representations or warranties of any kind, express or implied. 

This guide is presented solely for informational purposes. Users take full responsibility 

for their application of any products. 

This guide is designed solely for use by engineers, lighting designers and other 

professional within the lighting industry only. 

Information and support 

This guide tells you all about this system. 

If you require any further information or support please consult your local Philips office 

or please consult your Philips account representative. 

The advantages of LEDs have been known for 40 years: 

• Energy Efficient – uses less power (w) than conventional lighting 

• Long life – low maintenance cost 

• Robustness – high reliability 

• Saturated colors – maximum visual effect 

• Cool beam – no heating of illuminated products 

• No UV or IR – wide application possibilities 

• Low-voltage operation – more safety, ease of use 

• Mercury-free – care for the environment 

The use of LEDs has implications for lighting manufacturers in terms of differences in 

solid-state lighting usage compared with traditional lamps: for example how to design 

given the constant improvements in specifications: how to provide the necessary heat 

sink and how to deal with variations in flux and/or color. The Philips Fortimo LED 

Twistable Downlight Module addresses these differences and facilitates easy adoption of 

LED technology for the lumen packages, 1100 lm to 2000 lm.The system is designed for 

integration in luminaires. This technical application guide addresses the relevant issues to 

support and facilitate the work of specifiers and lighting system designers. 

Design In Guide Philips Fortimo LED Twistable Downlight Module Gen 2 3

Introduction to the Fortimo LED Twistable 

Downlight Module (TDLM) Gen 2 

Applications 

Philips Fortimo LED Twistable Downlight Module Gen 2 has been primarily designed for 

indoor applications but may, in certain circumstances, be used in certain damp location 

(provided all applicable laws and regulations are followed, including UL 1598). 

The Philips Fortimo LED TDLM, as the name suggests, is designed and intended for 

general downlight in accordance with North American luminaire standard, UL 1598. 

TDLM 1100 lm Module 

1 

Examples of applications include: 

• Hospitality (hotels representative areas such as receptions, boardrooms, 

restaurants, etc.) 

• Cruise ships (corridors, cabins) 

• Public buildings (schools, cinemas, theaters, exhibition halls) 

• Office (Corridors, reception/lobbies, waiting area) 

• Urban outdoor lighting (ground lighting, post-top lanterns) 

• Retail (corridors, general waiting area, dressing room area, mall facades) 

Product description 

To operate a system the following products are needed: 

• A Philips Fortimo LED TDLM Module Gen 2 

• A heatsink (sold separately) 

• A reflector (depending on the application) (sold separately) 

• Lampholder (sold separately) 

TDLM 2000 lm Module 

Classification 

The Philips Fortimo LED Twistable Downlight Module Gen 2 can be used in: 

• Non Class 2 system (luminaire heat sink must be grounded) 

• Neither the Philips Fortimo LED Twistable Downlight Module Gen 2 nor its 

lampholder can be used for wet location applications. So if an OEM decides to use 

the system in a luminaire for outdoor applications, the OEM is solely responsible 

for relevant approbation design as well as compliance with any and all laws, 

standards and regulations. 

About the module 

The protective housing allows easy handling during transport and installation. It 

also protects the LEDs from direct access/damage once mounted, and ensures the 

appropriate safety distance between the LEDs and any metal objects (for example 

a reflector). The connector allows quick and easy installation and replacement of 

the module. 


Generation 2 

Philips is continuously improving its Fortimo products. 

The second generation of the Fortimo LED Twistable Downlight Modules has been 

developed to enable LED adoption and upgrades very easily. The range aimed at energy 

efficiency has a very good Total Cost of Ownership and is easy to install. There is no 

training and tooling required resulting in low maintenance thus reduced running costs 

over the lifetime of the luminaire. 

This range changed from remote phosphor to white LEDs to help deliver better 

efficiency. The quality of LEDs does not require the phosphor plate anymore. The 

modules will continue to ensure the same high quality. 

Finally, the 1100 lumen module is Zhaga 1 certified, the full range of TDLMs will be Zhaga 

certified from Q2-2013 onwards. 

Philips Fortimo Twistable Module types 

The range of Twistable Gen 2 Modules 

Fortimo LED TDLM 1100 827 120V G2 






Note: Lampholder for both 1100 lm module and 2000 lm module are available at our 

complementary partners BJB and Ideal Industries. 

Note: 277 volt and 4000K CCT Modules will be available later in 2013 


LEDs powering Fortimo LED Twistable 

Downlight Module Gen 2 

The development of Light Emitting Diodes (LEDs) is progressing at such a pace that they 

are rapidly gaining a majority of use for lighting applications. To most people, the term 

LED still only means the small indicator lights that show whether the TV set is switched 

on. These tiny light sources barely emit enough light to make themselves visible. In the 

Fortimo LED Twistable Downlight Module Gen 2 system, multi-die white LEDs are used. 

This package enables high efficiency, high lumens, and minimum CRI of 80. 3 

What is LED? 

LEDs are solid-state devices, built up from crystalline layers of semiconductor material. 

The light generation process makes use of the special electronic properties of crystalline 

semiconductors in a process called injection luminescence. 

In brief, this means the injection of charged particles by an electric field from one 

semiconductor layer into another, where they are able to relax to a lower- energy state 

by emitting visible light. LEDs produce narrow light spectra. The bandwidth remains 

limited to a few tens of nanometers, and is therefore perceived by the human eye as a 

single, deeply saturated color. LEDs are now available in all wavelengths of the visible 

spectrum; yellow is the only region in which no high-power LED is currently available. 

White light can be produced by combining LEDs of different colors (for instance red, 

green and blue), or by applying phosphor coatings on blue or ultraviolet LEDs. Like many 

other lamps, LEDs cannot be connected directly to the mains. The LEDs have to be 

operated at a stabilized low voltage, which is provided by driver electronics. 

However, LEDs do not need ignition and can be switched on/off within milliseconds. 

LEDs do not generate nearly as much heat as many other lamps, but that does not mean 

that thermal design is not important. LEDs do produce heat when they operate, and are 

themselves relatively sensitive to temperature. Thermal considerations are therefore 

very important aspects of luminaire design that incorporates LEDs. 


LED packaging 

The bare LED die is still a very sensitive and fragile device that must be handled in a 

clean room environment. Before bringing them outside, they must be packaged. The 

light flux of conventional LEDs, for example those used as indicator lights on TV sets, 

is severely limited by the amount of heat generated. In practice, conventional LED 

packages are limited to about 0.15 W at most, and emit only a few lumens. The LEDs 

used in Fortimo LED Twistable Downlight Module Gen 2 are middle power single-die 

packaged, composed of blue dies with phosphor. 

Binning 

The subject of binning should be explained because of its importance in LED system 

design. As in other semiconductor manufacturing processes, in LED production the 

number of parameters of the epitaxial process is very large and the process window 

small (for example, the temperature must be controlled to within 0.5 °C (

Important recommendations and warnings 

Warnings 

• Follow installation rules explicitly 

• Inspect each product before installation 

• Do not install damaged LED modules 

The following recommendations and warnings should be followed during the various 

phases of use of the Fortimo LED Twistable Downlight Module Gen 2: 

Design-in phase 

Luminaire manufacturers must conform to the international standards for luminaire 

design (UL/CSA1598- luminaires). 

Design-in and manufacturing phase 

• Do not use damaged or defective contacts or housings. 

• Ensure proper heat management to help guarantee the lifetime of the module. 

Module replaceability 

The module can be easily replaced without deconnecting the mains 


Mechanical characteristics 

Mechanical construction of the Fortimo LED Twistable Downlight Module Gen 2 

The module can operate by using the main components below: 

• Fortimo LED TDLM Gen 2 

• Lampholder 

Note: the Fortimo LED Twistable Downlight Module Gen 2 1100 lm module and 

respective lampholders are Zhaga compliant 1 

Dimensions of the Fortimo LED Twistable Downlight Module Gen 2 range 

(dimensions in mm) 

Twistable Gen 2 1100 lm Top view 

Twistable Gen 2 2000 lm Top view 

Twistable Gen 2 1100 lm side view 

Twistable Gen 2 2000 lm side view 

Note: at the backside of each Fortimo LED Twistable Downlight Module Gen 2, you’ll find 

thermal interface material for optimal thermal contact to a heatsink. Important: Do not 

remove the thermal pad. 

Twistable Gen 2 1100 lm top view 

Twistable Gen 2 2000 lm top view 


Mechanical characteristics 

Note: Optical window is same for both modules (1100 and 2000 lm). 

Dimensions of the BJB lampholders 


Dimensions of the Stucchi lampholders 


Twistable TDLM Module Gen 2 Twistable DLM Module Gen 2 

1100 lm – BJB 1100 lm – Stucchi 

Twistable DLM Module Gen 2 Twistable DLM Module Gen 2 

2000 lm – BJB 2000 lm – Stucchi 


Dimensions of the Ideal lampholders (dimensions in mm) 

1100lm 

2000lm 

Assemble the lampholder on your heatsink with 3 M3 screws 


Lighting characteristics 

Light distribution 

The light distribution of the Fortimo TDLM is near lambertian and can be used for a 

multitude of applications. The light distribution can best be controlled using a specular/ 

near-specular reflector. 

Optical files 

On the Philips website (www.philips.com/ledmodulesna) optical files can be downloaded 

in the following formats: IES, including a file with Ray-sets. 

Photometric files can be used to check the modules far-field intensity distribution. 

The initial reflector or luminaire design can be carried out using a lambertian emitter 

to gain simulation speed. The final design should always be verified using a simulation 

executed with a rayset for the Fortimo Twistable Downlight Module. 

Spectral light distribution diagram 1100 lm module 






Lighting characteristics 

Polar intensity diagram 1100 lm 

Polar intensity diagram 2000 lm 

Note: TDLM Gen 2 can be operated at a max of 65C at the Tc point and maintain 

specified light output. TDLM Gen 2 can be operated at a max of 70C at the Tc point, but 


will result in 2% light loss. 

Color consistency (SDCM) 

The target specification of the Philips Fortimo LED Twistable TDLM Module Gen 2 

range for colour consistency is within 4 SDCM 2 ellipse inside ANSI quadrangle. SDCM 

stands for Standard Deviation of Color Matching and the value 4 refers to the size of an 

ellipse around the black body locus. 

Note: Philips maintains a tolerance of ± 0,005 on x, y color points measurements. 

This figure shows color targets for the different color temperatures of the Fortimo 

LED Twistable Downlight Module Gen 2 Modules. These are specified in the operating 

conditions (Tc 65 °C). In the application a color shift is possible if the Tc temperature is 

significantly lower than in these targets. 

Reflector design 

The reflector design can be done by the OEM or can be supplied by a 

complementary partner. 

If the OEM wants to design its own reflector, raysets can be downloaded from the 

Fortimo website (www.philips.com/ledmodules). If more support is needed, please 

contact the key account manager or your local Philips sales representative. 

Different reflector suppliers have designed a reflector that fits the Philips Fortimo 

LED Twistable Downlight Module Gen 2; Jordan, ACL, Alux Luxar and NATA. These 


Thermal management 

companies can be contacted via their website. 

The critical thermal management points for the module and driver are set out in this 

chapter in order to facilitate the design-in of Fortimo LED Twistable Downlight Module 

Gen 2. Keeping these thermal points in mind will help to ensure optimal performance 

and lifetime of the system. 

Operating temperatures – Definitions 

• Module temperature: temperature measured on the Tc point of the module 

• Ambient temperature: temperature outside the luminaire 

Temperature test point at bottom PCB 

Module Type 1100 lm 2000 lm 

Max Tcase 70 °C (all CCTs) 70 °C (all CCTs) 

Max Thermal Power at thermal interface @ 2700 K 10.6W 19.1W 

Max Thermal Power at thermal interface @ 3000 K 9.7 W 18.5W 

Max Thermal Power at thermal interface @ 3500 K 9.7W 18.4W 

Tambient 45°C 45°C 

Test requirements 

The test results of T case and T ambient case of the Module in open air or in the 

standard wooden box will give different results. The worst case test is the wooden box 

with T ambient 45 ºC. 

Temperature measurements should only be performed when the luminaire is thermally 

stable, which may take 0.5 to 2 hours depending on the thermal capacity of the 

luminaire. For all measurements such as temperature, luminous flux and power, a 

stabilization period of at least half an hour must be allowed before any reliable data can 

be obtained. Measurements must be performed by means of thermocouples that are 

firmly glued to the surface (and not, for example, secured with adhesive tape). 

Maximum Temperature 

Because LEDs are temperature-sensitive, LED modules require a different approach 

with respect to the maximum permissible component temperature. This is different than 

most other types of light sources. Some of the LED modules have a shut down circuit 

when temperature becomes to high. 

The Fortimo LED Twistable Downlight Module Gen 2 has no shut down circuit and 

therefore requires proper thermal design. 

Critical measurements Tc point 

For LEDs the junction temperature is the critical factor for operation. Since there is a 

direct relation between the case temperature and the LED junction temperature it is 

sufficient to measure the bottom side of the module. The critical point is on the back 

surface of the LED module. If the case temperature (Tc) at the critical measurement 

point is too high (exceeding 70°C), the performance of the LEDs will be adversely 

affected, for example in terms of light output, lifetime or lumen maintenance. 


Case temperature 

To ensure the performance and to enable temperature measurement in a luminaire, 

a Tcase point has been defined at the back surface on the Fortimo Twistable Downlight 

Module Gen 2. 

Module with closed heat sink 

Where to pay attention? 

• Tcase can be measured on the heat sink, either by making a v-groove in the 

heat sink (Tcase 1) OR making a drill hole in the heat sink (Tcase 2) (gluing the 

thermocouple-wire to the heat sink is strongly recommended). 

• The Thermal Interface Material (TIM) stays on the twist and makes thermal contact 

with the heat sink. 

Module with open heat sink 

Where to pay attention? 

• Tcase can be measured on the heat sink, by making a v-groove in the heat 

sink (Tcase 1) (gluing the thermocouple-wire to the heat sink is strongly 

recommended). 

• The Thermal Interface Material (TIM) stays on the twist and makes thermal contact 

with the heat sink. 



Operation under built-in conditions 

The heat produced by LED module in the luminaire (or similar housing) must be 

dissipated to the surroundings. If a luminaire is physically insulated by a ceiling, wall 

or insulation blanket, the heat produced cannot easily be dissipated. This will result in 

heating of the LED module in the luminaire, which in turn can have an adverse effect on 

system performance and lifetime. For optimum performance and lifetime it is important 

that: air can flow freely around the luminaries; and airflow through the luminaire, around 

the modules, has a positive effect on temperature control and hence on performance 

and lifetime. 

Thermal interface 

In the Fortimo LED the thermal interface is already attached on the module. 

Do not remove the thermal interface material. 

Heatsink design 

To ensure that housing temperatures do not exceed the specified maximum values, a 

luminaire can act as an additional heat sink. The applicable heat transport mechanisms 

are conduction via the heat sink and convection and thermal radiation to the 

surroundings. The objective of this chapter is not to indicate exactly how to calculate 

a heat sink, but to give some guidelines on how to improve its performance. Although 

a heat sink can have many (complex) shapes, the following discussion is based on a 

disk type of heat sink. The results for square plates, etc., may be similar provided the 

surface areas are equal. The type of material used has a relatively large influence on 

the final result. For example, a comparison of the thermal conductivity (k) of copper 

with that of corrosion- resistant steel (see table left) shows that a substantially smaller 

heat sink can be made with copper. In practice the best material for heat sinks is (soft) 

aluminum. The thickness (d) of the heat sink disk is also of major importance. Assuming 

the use of different heat sinks of the same diameter but made from different materials, 

the same effect in terms of temperature difference will be achieved if the product of 

thermal conductivity (k) and disk thickness (d) is constant. This means a similar result 

is obtained with a disk of 1 mm copper, 2 mm aluminum, 4 mm brass, 8 mm steel or 26 

mm corrosion-resistant steel. Increasing the diameter, and thereby also the surface area, 

of the heat sink disk also leads to an improvement, but the effect is smaller for larger 

diameters and depends on the thermal conductivity (k) of the material and the thickness 

(d).Thermal radiation can also form a substantial part of the total heat transfer, and is of 

the same order as for convection. This depends strongly on the emission coefficient of 

the surface, which lies between 0 and 1. For example, a polished aluminum surface has 

a very low emission coefficient, while that of a painted surface is very high. For passive 

cooling, high emission coefficient is preferred. 


Thermal Conductivity 

Material 

W/mK 

Copper 400 

Aluminium 200 

Brass 100 

Steel 50 

Corrosion-resistant steel 15 

Emission 

Material Surface Emission coefficient 

Aluminium New/polished 0.04 – 0.06 

Oxidized 0.2 – 0.3 

Anodized 0.8 

Steel Painted 0.8 – 0.95 

New/Polished 0.03 – 0.07 

Heavy oxidized 0.7 – 0.8 

Thermal de-rating system 

The Fortimo LED Twistable Downlight Module Gen 2 has no shutdown circuit and 

therefore requires proper thermal design. 

Size of heatsink & Thermal Interface Material (TIM) 

The module contains a built-in heat spreader. The module must be connected to the 

heat sink with a thermal interface material (TIM) in between which makes sure of a 

perfect contact between the module and the heat sink. The module has a thermal power 

that needs to be taken away. The spreader at the back of the module is the contact 

area for the external heat sink. The performance (life time and amount of light) of the 

module depends heavily on the thermal management. Therefore the temperature of the 

test point (Tc) is important. During the thermal design process, the aim is to keep the 

Tc temperature at the stated range. Thermal Interface Materials (TIM) are thermally 

conductive materials, which are applied to increase Thermal contact conductance 

across jointed solid surfaces, such as between microprocessors and heatsinks, in order 

to increase thermal transfer efficiency. Without a TIM the heat that is generated by 

the module cannot be managed effectively by the heat sink. This will result in poor 

performance or total failure of the module or fixture. 

Please note that in an assembly scenario where metal screws are not used to fix the 

heat sink to the module, then a non-isolated thermal interface material (also known as 

electrically conductive TIMs) must be used to ensure proper grounding. 



Air flow 

Before starting with any calculation, an important point to consider is the airflow. In 

general hot air is moving upwards with relatively low speed. The form and position of 

the heat sink is influencing the airflow. If the fins are perpendicular to the airflow which 

reduces the efficiency of the heat sink. This situation should be avoided. 

A better way to position the fins is to have the fins parallel to the airflow direction. 

Closing the top of the profile will reduce the efficiency of the heat sink as well, and 

should be avoided during design and installation. 

Thermal model 

Standard STATIC thermal situations can be modelled with so-called thermal resistances. 

These resistances behave like electrical resistors. Below the analogy between electrical 

and thermal resistors is explained. Where on the left the electrical units are mentioned, 

on the right the thermal equivalent is set. With a known voltage difference at a certain 

current it is possible to calculate an electrical resistor with Ohm’s law. The same is 

possible with a thermal resistor. If the temperature difference and the thermal power is 

known, the thermal resistance can be calculated with thermal Ohm’s law. 

Analogy between electrical and thermal resistance 

Thermal model 


Calculating your heat sink 

We start with a thermal calculation formula: 

Formula (f1) the relation between temperature difference, thermal power and thermal 

resistance. With this formula the needed thermal resistance can be calculated when the 

thermal power and temperature difference are known. 

Formulas: 

Thermal: Δ T = Rth x Pth (f1) 

Next we gather all available information, as can be found in the datasheet, application 

details and design choices. 

Below we calculate the needed thermal resistance of the heat sink, such that in typical 

situations, the typical temperature of the test point Tc, is below its maximum. 

Available information 

Tc-max = 70ºC 

Pth- Twistable DLM 2000 lm, 3000 K = 19.1 W 

Tambient-max in application = 50ºC 

Below we show an example of how to calculate the needed thermal resistance of the 

heat sink, such that in worst case situations, the maximum temperature of the test point 

Tc, is below its maximum. 

Calculation of total maximum thermal resistance: (f1) 

ΔT - Tlmb = 70 – 45 = 25ºC 

Rth = ΔT / Pth = 25/19 = 1.31 K/W 

Now we know the thermal resistance of the needed heat sink. This heat sink dimension 

is such that at maximum power and maximum ambient temperature claimed by the 

luminaire makers, the temperature of the test point Tc should be below 70°C. This 

assures that lifetime, color temperature, and light output will be according to specifications. 

The heat sink dimension can be smaller if the luminaire maker claims a Tambient-max less 

than 45ºC. Calculation would be carried out according to a similar methodology. 

Interested in the heatsink complementary partners: 

Three of the heatsink partners that have been working with Philips are Nuventix, 

AVC, and Sunon. All three have made heatsinks specifically for Fortimo LED Twistable 

Downlight Modules according to the reference heatsink design from Philips. 

The following are suggestions of products that can be used with certain Philips Fortimo 

LED Twistable Downlight Modules. References to these products does not constitute 

their endorsement by Philips. Philips makes no warranties regarding these products and 

assumes no legal liability or responsibility for loss or damage resulting from the use of 

the information herein. 

• www.avc.com.tw 

• www.nuventix.com 

• www.sunoueurope.com 


Electrical design 

Wiring 

The mains supply cale must be connected to the lampholder. 

The earth connector needs to be connected to the heatsink/luminaire because the 

Fortimo LED Twistable Downlight Module Gen 2 is specified as class I. 

The lampholder is screwed with 3x M3 metal screws to the heatsink. 

In an assembly scenario where metal screws are not used to fix the heat sink to the 

module, then a non-isolated thermal interface material (also known as electrically 

conductive TIMs) must be used to ensure proper grounding. 

Length of mains cable 

The length of the mains supply cable from the module is approximately 25 cm. The 

length of the extension cable outside of the luminaire is not specified. 

Starting characteristics 

The system can be switched on in milliseconds, which is a general characteristic 

of LED based systems. Unlike conventional CFL’s, there is no observable 

start up time. 

Low and overvoltage 

The modules can withstand a voltage fluctuation of +/- 10% with no safety 

issue and no abnormal early failures. 

Inrush current 

The current that flows during the very first few milliseconds when switching on a 

luminaire or an entire lighting installation is called the inrush current. This current 

is very important when making the right choice of switch gear and fusing, e.g. circuit 

breakers, miniature circuit breakers (MCB). The inrush current is determined in part by 

the circuitry in use and in part by the properties of the mains supply, viz. the mainssupply 

impedance and the supply-cable resistance. The moment of switching in relation 

to the sine wave of the supply voltage also determines the value of the inrush current. 

The highest inrush current is when the driver is connected to the mains at the peak of 

the mains voltage. 


Product Mains input power (W) Inrush current (A) Half time value (µs) 

Twist 1100 lm 16.5 1.52 45 

Twist 2000 lm 29.5 2.0 50 

Product B16 B10 C16 C10 

Twist 1100 lm 40 40 40 40 

Twist 2000 lm 40 38 40 38 

Recommended maximum number of modules to be connected to a circuit breaker type 

Note: Numbers could slightly differ depending on the circuit breaker and amount of 

modules installed on a circuit breaker. 

Dimming 

The Philips Fortimo LED Twistable Downlight Module Gen 2 is leading edge dimmable. 

Please contact your Philips sales representative for the most up-to-date dimmer 

compatibility list. 

Switching 

The maximum number of switching cycles at each case temperature up to which the 

modules reaches B10L0 at 35khrs: 

Max. cycles to B10L0 Twist NAM 1100lm Twist NAM 2000lm 

Tcase=70C 4000-4500 3500-4000 

Tcase=65C 6000-6500 5000-5500 

Tcase=55C 10000-12000 8500-9500 

Notes: Philips maintains a tolerance of ± 6.5% on luminous flux, ± 2% on CRI 

measurements and ± 5% on CCT measurements. 


Quality 

Compliance and approval marks 

The Philips Fortimo LED Twistable Downlight Module Gen 2 is UL/CSA-approved. 

To ensure luminaire approval, the conditions of acceptance need to be fulfilled. 

Module-related data can be found in UL1993. All luminaire manufacturers are advised 

to conform to the international standards of luminaire design (UL1598-Luminaires). 

Sustainability 

The Philips Fortimo LED Twistable Downlight Module Gen 2 is RoHS compliant. 4 

Conditions of acceptance 

Details can be requested from your local sales representative. 

IP rating, humidity and condensation 

The Fortimo LED Twistable Downlight Module systems are build-in systems and 

therefore have no IP classification. They are not designed for operation in the open air. 

The OEM is responsible for proper IP classification and approbation of the luminaire. 

The module has been developed and released for use in damp locations and not for 

locations where condensation is present. 


If there is a possibility that condensation 

could come into contact with the modules, 

the system/luminaire builder must take 

precautions to prevent this. 

Energy Star 

The product is listed in “The Certified Lighting Subcomponent Database” on Energy 

Star Website. The link is below: 

http://www.energystar.gov/index.cfm?c=lighting.pr_lighting_subcomponents 

California Title 24 

The product is far more efficient than what is required in California Title 24. With 

proper optical design at luminarie level, the luminarie will meet California Title 24. 5 

EMC 

Electromagnetic compatibility, EMC, is the ability of a device or system to operate 

satisfactorily in its electromagnetic environment without causing unacceptable 

interference in practical situations. The module was tested in a reference luminaire and 

no issues were observed. 


Sustainability 


Cautions relating to use during storage, 

transportation and operation. If this 

product is stored for a long time (more 

than one week), it should be stored in a 

dark place. Do not expose it to sunlight. 

The temperature should be maintained at between -40 ~ +65 °C, and RH 5-95%. 

During operation 

Philips shall not be held responsible for any damage to the user arising from an 

accident or any other cause during operation of the system if the absolute maximum 

ratings are exceeded. 

System disposal 

We recommend that the Fortimo LED Twistable Downlight Module and its components 

are disposed of in an appropriate way at the end of their (economic) lifetime. The 

modules are in effect normal pieces of electronic equipment containing components 

that are currently not considered to be harmful to the environment. We therefore 

recommend that these parts are disposed of as normal electronic waste, in accordance 

with all applicable federal, state and local laws and regulations. 

Other 

The product has not been evaluated for use with emergency exits. 

Contact Details 

For specific questions on our products, please contact our regional team. 

Footnotes: 

1 Philipe Fortino LED Twistable Downlight Module is a Zhaga certified light engine. For more information 

visit www.zhagestandard.org. 

2 All production units fall betweem =/-0.2% 

3 +/- 3% variance with all CRI above 80 

4 Restrictions on Hazardous Substances (RoHS) is a European directive (2002/95/EC) designed to limit the 

content of 6 substances [lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls (PBB), and 

polybrominated diphenyl ethers (PBDE)] in electrical and electronic products For products used in North 

America compliance to RoHS is voluntary and self-certified 

5 Please refer to http://www.energy.ca.gov/title24/ for the latest requirements. 




© 2013 Philips Lighting Electronics North America 

A Division of Philips Electronics North America Corporation 

All rights reserved. 

Printed in the USA 

Form No. LE-6400-B 

Philips Lighting Electronics N.A. 

10275 West Higgins Road 

Rosemont, IL 60018 

Tel: 800-322-2086 Fax: 888-423-1882 

Customer Support/Customer Care: 800-372-3331 

OEM Support: 866-915-5886 

www.philips.com/ledmodulesna

Design-in guide - Philips Lighting

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