Traffic Route I Residential Street/Area I Tunnel & Underpass I ... - Indal

Stela 

Traffic Route I Residential Street/Area I Tunnel & Underpass I City Centre I Architectural & Landscape 

Sports Lighting I Large Outdoor Industrial Area I Agricultural Area I City Planning+

2 Stela | Indal

TRIPLE-C: The perfect balance 

The Stela range is an outstanding example of Indal’s TRIPLE-C philosophy: 

it creates a new balance between Costs, Comfort and Care. With REVOLED 

technology exceptionally high energy savings can be achieved. With no 

need for light source replacements the attractive Total Cost of Ownership 

over the service life time of an installation will show that fantastic 

results can be accomplished. The required Comfort can be chosen by 

selecting from different light colours, optics and designs. 

Costs 

Very attractive Total Cost of Ownership 

propositions: 

• Energy efficient COO-LED thermal 

management concept increasing 

available lumens / Watt. 

• Very effective DIRECTA optical 

system reducing both energy and 

luminaire costs. 

• Extremely long-life LED light source 

resulting in less maintenance and 

high availability. 

Comfort 

Different white light solutions for 

different outdoor applications: 

• Various light distributions for a wide 

range of street and area geometries. 

• Good optical control to prevent 

undesired glare and obtrusive light. 

• From cold to warm white light colour 

to suit the desired ambiance. 

• Range of Stela designs and mounting 

options. 

Care 

Energy saving REVOLED technology 

with a positive contribution to the 

environment: 

• Highly reduced energy consumption 

and CO 2 

emissions. 

• No undesired spill of light due to 

precise aiming of light (DIRECTA 

optics). 

• Luminaire manufactured largely from 

recyclable materials. 

Costs 

Stela’s perfect 

balance 

Care 

Comfort 

Indal | Stela 3

Stela, a revolutionary 

success at your doorstep 

Stela is at the forefront of LED technology in public lighting. 

Already numerous cities and villages have benefited from Indal’s 

integral LED luminaire design approach REVOLED. Their large 

scale confidence in Stela has made it a proven standard in 

efficient LED public lighting. 

Stela, its own identity for a new era 

Take one glance at Stela and it becomes clear that it is something totally different from what we have been used to in 

public lighting up to till now. Using LEDs for functional outdoor lighting provides luminaire designers with new opportunities 

in design to beautify public spaces. The luminaire has become less the “packaging” of the lamp: light source and housing 

are much better integrated in one clear design concept. The benefits of Stela are evident. 

The cooling and light distribution concept REVOLED enables enormous energy savings and reduction of carbon footprints, 

while meeting current lighting standards. The perfect cooling also gives an extended life time of the LEDs of more than 20 

years (or 100,000 operating hours) and virtually eliminates maintenance. The resulting Total Cost of Ownership becomes 

very attractive. Stela has its own unique identity designed for a new era in lighting. The range especially covers the 

residential street and area applications and consists of the post top types Square and Wide, the post top / side entry Long 

and the symmetrical round post top Round. 


“After having evaluated 

many luminaires, Stela 

is the best and most 

advanced LED lighting 

solution in the market.” 

Graham Scragg 

Amey Constructing Company, United Kingdom 

Case Study: 

Birmingham and its successful 

transition towards quality and 

sustainable lighting 

In five years, approximately 50% of the street 

lighting in the city of Birmingham will be replaced 

and all the residential areas will incorporate Stela 

LED lighting totally remotely controlled. Management 

and maintenance of their street lighting will be 

done by means of a PFI (Private Financial Initiative) 

assigned by the Town Hall to Amey, a UK public 

service company in infrastructure and maintenance, 

for the next 25 years. 

Approximately 23,000 Stela’s will be installed in all 

residential areas with traffic routes to follow. 

“We deliberately took the challenge to start 

with LED for residential street and area lighting, 

as this is the biggest application area in public 

lighting with the biggest savings potential for 

public authorities.” 

Wim Visser 

Product Manager Road Lighting / Application Manager Infrastructure 

According to Amey, the advantages of Stela are 

numerous. Stela will reduce energy consumption 

and carbon emissions significantly. The long life and 

minimal maintenance requirements will cut operating 

costs immediately. The fully dimmable Stela street 

lights will provide good optical control, which 

allows for both the reduction of light pollution and 

obtrusive light. The city also expects a reduction 

in the fear of crime as a result of the improved 

illumination and excellent colour rendering. 

Stela was specifically designed to utilise LEDs as 

a light source, and there have been no failures in 

the first few thousands luminaires installed by Amey 

to date. 


LED Warranty Plan 

Thanks to our REVOLED technology, we can maximize the cooling of 

LEDs and offer optimal thermal management resulting in a guaranteed 

long life time of the LED luminaire. As a result Indal offers a special 

LED Warranty Plan for their LED luminaire range to limit the risks of the 

relatively higher investments in LED lighting. 

Apart from the general conditions on product warranty written in the Indal general sales conditions, we qualified the Indal LED 

luminaires into different warranty classes depending on their performances. For a further description of these warranty classes and 

LED Warranty Plan conditions please visit www.indal-lighting.com or ask your local Indal contact. For Stela luminaires the following 

LED warranty classes are effective: 

SILVER 

The standard warranty period is 25,000 

operating hours or 5 years (whatever 

reached first) / L80 (a minimum of 80% of 

the originally installed LED light output). 

GOLD 

The warranty period can be extended to 

50,000 operating hours or 10 years (whatever 

reached first) / L80 (a minimum of 80% of 

the originally installed LED light output) for 

Stela versions up to max. 350mA current. 

Qualification for Gold warranty can only be 

approved when the purchased Stela has 

been properly registered with the “LED 

Warranty Plan Registration Form”, that is 

available on www.indal-lighting.com. 

GOLD PLUS 

The warranty period can be extended to 

100,000 operating hours or 20 years 

(whatever reached first) / L70 (a minimum 

of 70% of the originally installed LED light 

output) for Stela versions up to max. 

350mA current. To extend the warranty plan 

from Gold to Gold Plus the original 

purchaser pays an amount to compensate 

for the enjoyed life of the product from 

11-20 years. The Gold Plus warranty can 

only be approved when the purchased Stela 

has been properly registered with the LED 

Warranty Plan Registration Form, that is 

available on www.indal-lighting.com. 

LED Driver Warranty Plan 

In case of a failing LED driver during the first 5 years (for Gold Plus, Gold and Silver products) of the warranty period, a new driver will be 

supplied free of charge to the original purchaser, under the condition that the failing driver is first returned to Indal. In case of Gold Plus or 

Gold warranty after year 5 of the warranty period a new driver will be supplied against a special payment per driver, under the condition 

that the failing driver is first returned to Indal. For further conditions, please visit www.indal-lighting.com or ask your local Indal contact. 


Advanced REVOLED 

technology 

LED Quality 

Concerns aspects like lumen packages, 

light colours, power consumption, life 

time expectancy and lumen depreciation. 

Thermal Management 

Concerns aspects like thermal resistance 

of the LEDs, inter distance of the LEDs in 

the luminaire and heat dissipation from 

the LEDs. 

Optical Management 

Concerns aspects like light output ratio, 

light distributions and tilt options as well 

as distribution reliability after incidental 

individual LED failure. 

Design Approach 

Concerns the design of the luminaire for 

optimal use of technical LED characteristics 

in a dedicated new design concept 

(REVOLED) or by backward engineering 

where LED engines are installed in 

existing luminaires (RETROLED). 

In today’s LED application for residential street and area lighting the 

aim is to light a certain area to the relevant lighting standard, at the 

lowest possible energy consumption and operation costs, with an 

acceptable lighting comfort and appearance. The LED choice itself, 

the thermal integration into the luminaire, the optical system and the 

overall design will define the outcome. REVOLED is an integral 

design approach to come to the optimal balance between those 

corner stones for each luminaire. 


Advanced REVOLED technology 

As luminaire functions vary, the weighing of those characteristics can be different per 

luminaire concept. For Stela the REVOLED technology consists of the innovative and 

efficient COO-LED cooling principle and the very effective DIRECTA lens technology, 

in order to respond to the high social priority attached to energy saving and CO 2 

reduction. 

LED Quality 

COO-LED 

thermal management 

For Stela high 

performance High- 

Power quality LEDs * 

are used, realising up 

to 140 “hot” lumens 

@ 350mA per LED 

in Cool White light 

colour. Warmer light 

colours at lower lumen output are also available: 

Neutral White (up to 125 lumen) and Warm White 

(up to 110 lumen). 

By selecting (binning) LEDs with low power 

consumption, combined with high efficiency 

drivers, the total luminaire “system” power 

consumption @ 350mA reaches 118 lumen/Watt. 

Next to the high quality of the LEDs themselves, 

the “hot” flux of the LEDs in Stela is high as a 

result of the carefully chosen inter distance of 

the LEDs and the efficient COO-LED cooling 

technique. 

* Selection of LEDs is under continuous development, please ask 

your local Indal contact for the latest updates. 

The performance of LEDs depends to a high degree on 

the operating tempera ture. Therefore, optimum 

cooling of the LEDs is necessary. COO-LED delivers 

superior temperature control by combining low 

current LEDs with a large cooling surface that is an 

integral part of the luminaire housing. LEDs are 

bonded directly to the outer skin of the luminaire, 

eliminating any insulation in the heat dissipation 

path. As a result the thermal loss of the original flux of the LEDs is around 2.5% 

only, which ensures a high LED efficiency. The luminaire body is also designed to 

ensure optimal drainage and cleaning of the luminaire. 

By keeping the operating temperatures of the LEDs (T-junction) low, and driving 

the LEDs at low currents, the expected life time of the LEDs is considerably 

extended. In this way the light source will last for as long as the entire service 

life time of the luminaire (normally 20-25 years, 100,000 operating hours), so there 

is no need for any future lamp replacements. 

The ambient temperature of the LED luminaires also has an effect on the operating 

temperature of the LEDs (the lower the Tamb the higher the LED flux). Therefore, in 

Stela the optimal Tamb-flux rate is selected at normal average (night) temperatures 

for outdoor lighting. 

TEMPERATURE-FLUX CURVE STELA SQUARE 18LED 

Relative flux in % 

120 

110 

100 

90 

80 

70 

60 

50 

40 

30 

20 

-30 -20 -10 0 10 20 30 40 

Tamb (ºC)* 

Typical Temperature-flux curve for Stela 18LED. 

*Average ambient (outdoor operating) temperature. 


DIRECTA 

optical management 

integral new 

Design approach 

The COO-LED method allows the LEDs to 

produce the maximum amount of light. 

An optical device is required subsequently 

to direct the light. In Stela this is the 

DIRECTA lens technology. 

Conventional light sources use reflectors, 

refractors or indirect optics to direct the 

light. In addition a bowl is traditionally used to cover this optical system. 

DIRECTA clear lenses are directly integrated into the luminaire housing, IP 66 

protected, with no additional cover required. The result is high luminaire 

efficiency (Light Output Ratio) of up to 92% (depending on the lens type). 

That’s 10-25% more efficient than conventional lighting solutions. 

LEDs are very small light sources, allowing the light to be directed very 

accurately by means of lenses. In this way light spill (both upward light and 

obtrusive light to the sides of the street/area) can be avoided. Thus even further 

increasing the efficiency of the lighting installation and preventing light 

pollution and glare at the same time. 

Various lens types are available for different project geometries and functions. 

Every indivi dual lens gives the same light distribution and unifor mity (overlay 

method). Multiplication of LEDs increases the lighting levels. Because of this, 

even in case of individual LED failure the light distribution will remain 

unaffected and therefore conformity to standards is secured. 

The Indal design team 

opted for a clearly 

individual character for 

Stela: it is immediately 

clear that it involved 

something new. 

The modern shapes, 

from the rectangular 

Square and Wide to the longitude Long and round 

symmetrical Round, have serene, recognisable lines 

and will therefore be at home in various environments. 

This makes the Stela range extremely suitable as a 

standard product for residential areas in particular, 

where a certain timelessness is often essential, 

especially when used on a large scale. 

The slightly curved shape of the luminaire makes it 

visible from a distance, without causing disturbing 

glare. In this way it fulfils its orientation function. 

Stela’s individual character also shows up well when 

used to create more specific ambience in particular 

places, such as boulevards, squares, parks, shopping 

areas and around buildings. 


Stela Square 

10 LED 14 LED 18 LED 

A compact post top luminaire up to 18 LEDs, 

perfectly suitable for relatively lower mounting 

heights and lighting levels in residential areas, 

squares, parks, pedestrian zones, but also around 

buildings. 


Compared to a conventional system 

Stela Square can offer reduced 

energy costs (up to > 50%) reduced 

CO 2 

emissions and no lamp 

replacement costs, resulting in 

significantly improved Total Cost 

of Ownership. 

DIRECTA optics available in Stela Square: 

TCO example Stela Square 14LED @350mA 

versus traditional FSD-36 luminaire. 

Total Cost of Ownership 

Wide Road Optic ME 5/6 Optic Pedestrian Crossing Optic 

Road-Standard (SRN) Road-Narrow (NRN) Road-Wide (WRN) Road-ME5/6 (MRN) Road-Pedestrian Crossing 

(ARN-Left Hand Drive or 

Right Hand Drive) 

FSD-36 

Stela 14LED 

@350mA 

Stela Square - Typical data at low and high current* 

Lamp replacement costs 

Energy consumption 

Luminaire & Installation 

350mA current 

700mA current 

LEDs Hot Psys*** Lm/W Expected led Hot Psys*** Lm/W Expected LED 

lumen** LIfe time**** lumen** LIfe time**** 

10 1400lm 14W 100lm/W 100,000h/L85 2500lm 26W 96lm/W 100,000h/L80 



* Data @ average ambient (outdoor operating) temperature of 20-25ºC. 

** Lumen data for Cool White. For Neutral White take -12% and for Warm White -23% lumen. 

*** Psys = Total power consumption (LED + driver). 

**** 100,000-L85 = 85% of original lumens maintained after 100,000 operating hours. 



Stela Wide can offer reduced energy 

costs (up to > 50%) reduced CO 2 

emissions and no lamp replacement 

costs, resulting in significantly 

improved Total Cost of Ownership. 

TCO example Stela Wide 

36LED @350mA versus 

traditional ST-70 luminaire. 

DIRECTA optics available in Stela Wide: 


ST-70 

Stela 36LED 

@350mA 

Wide Road Optic ME 5/6 Optic Pedestrian Crossing Optic 

Road-Standard (SRN) Road-Narrow (NRN) Road-Wide (WRN) Road-ME5/6 (MRN) Road-Pedestrian Crossing 






Stela Wide - Typical data at low and high current* 

350mA current 

700mA current 











Stela Wide 


The rectangular Stela Wide is a very 

versatile post top luminaire up to 52 LEDs. 

Due to the high maximum lumen packages 

suitable up to relatively higher mounting 

heights and lighting levels in residential 

areas, squares, parks, pedestrian zones, 

but also around buildings. 


Stela Long 

10 LED 14 LED 18 LED 24 LED 30 LED 

The Stela Long in its longitudinal shape is typically 

used for side entry installations. With a maximum 

of 30 LEDs, its lumen packages create a perfect 

overlap between Stela Square and Wide. In this way 

it completes the application scope for especially 

residential roads and areas, but of course it can 

also be used in squares, parks, pedestrian zones etc. 



Stela Long can offer reduced energy 





DIRECTA optics available in Stela Long: 

TCO example Stela Long 30LED @350mA 

versus traditional ST-50 luminaire. 


Wide Road Optic 

Pedestrian Crossing Optic 

Road-Standard (SRN) Road-Narrow (NRN) Road-Wide (WRN) Road-Pedestrian Crossing 



ST-50 

Stela 30LED 

@350mA 

Stela Long - Typical data at low and high current* 

350mA current 

700mA current 

















Stela Round can offer reduced energy 





TCO example Stela Round 18LED @350mA 

versus traditional 2x FSD-24 luminaire. 

DIRECTA optics available in Stela Round: 


Wide Optic 

Road-Wide (2330 WRN) 

Area-Wide (2335 WRN) 

2xFSD-24 

Stela 18LED 

@350mA 




Stela Round - Typical data at low and high current* 

350mA current 

700mA current 



12 1650lm 16W 103lm/W 100,000/L85 2900lm 30W 96lm/W 70,000h/L80 





16 Stela | Indal 




**** 100,000-L85 = 85% of original lumens maintained after 100,000 operating hours.

Stela Round 


36 LED 48 LED 

The central and elegant post top shape makes Stela Round 

aesthetically suitable for many applications. The symmetry in 

which the LEDs, with a maximum of 48 LEDs, are arranged in the 

natural round shape adds a certain flair to the environment. It is 

very suitable for areas like parks or squares (area distribution), 

but can also be used in normal street geometries (road distribution). 


Stela the proven standard 

With its serene, recognisable lines the modern Stela shape will be at 

home in various environments. As a standard luminaire for residential 

area, where a certain timelessness is often essential. Or as a decorative 

element to enrich a specific area. Its large range of variations in types, 

optics, currents, light colours and different LED configurations makes it 

a new standard and a customised LED solution at the same time. 

265 mm 

265 mm 

600 mm 

400 mm 660 mm 

445 mm 

445 mm 

670 mm 

595 mm 

600 mm 

Stela Square 

Stela Wide 

Stela Long Side Entry 

Stela Long Post Top 

Stela Round 

Stela in perspective 

Stela Square 

Stela Wide 

Stela Long 

Stela Round 

(10 to 18 LEDs) suitable for mounting heights of 4-6m post top. 


(10 to 30 LEDs) suitable for mounting heights of 5-8m post top and side entry. 


ROUND 

ROUND 


Stela technical characteristics 

STELA – Windage and Weight 

Type Windage Weight 

In kg. 

STELA SQUARE 0.04 5.3 

STELA WIDE 0.06 8.2 

STELA LONG 0.05 7.0 

STELA ROUND 0.065 7.5 

MATERIALS 

• Housing, spigots, adapter and gear 

cover made of LM6 / DIN230 

die-cast aluminium. 

• Clear plastic DIRECTA lenses 

(PMMA). 

Finish 

The standard colour is Futura Gris 900 

Sablé (anthracite). Other RAL or Futura 

colours available on request. 

Ingress Protection 

IP 66. 

Impact Resistance 

IK 10 housing. 

Mounting 

• Suitable for post top Ø 60-76mm, 

Stela Long also in side entry version 

Ø 60mm. 

• Installation to the column by two 

M10 stainless steel bolts. 

• Built-in tilt angle of 10° for Stela 

Square and Wide. For Stela Long the 

spigot arrangements allow for tilt 

adjustments. 

Cable Connection 

In the driver compartment on 

plug / socket. 

Drivers 

Electronic LED drivers mounted on 

a galvanised steel tray in the driver 

compartment on top of the Stela 

cover. The driver compartment is easy 

accessible by removing screws. 

We offer various currents and dimming 

options. 

For more technical characteristics we refer to the Stela products pages in the Indal Technical lighting catalogue 2010 / 12 

or on www.indal-lighting.com.

Traffic Route I Residential Street/Area I Tunnel & Underpass I ... - Indal

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