Incandescent lighting - Palissy Galvani

"Standard" incandescent lamps
"Standard," incandescent lamps are the most commonly used lamps. They can be
found just about everywhere; they are used for bedside lamps, dining room lamps, etc.
Technically speaking the product is perfectly mastered by manufacturers. The value
for money that these lamps offer is very good, but the product's limited possibilities
cannot satisfy all requirements in the lighting field. This is why manufacturers were
required to develop discharge lamps and the use of other technologies.
Details of an incandescence lamp
1. Envelope
Standard lamps are encased in glass. The airtightness
of glass contains the gassy atmosphere that suits the
filament. Its transparency enables the rays emanating
from the filament to be seen. This is sometimes
called the "glass bulb"..
2. Gassy atmosphere
The gassy atmosphere is a mixture of nitrogen and
argon to which often is added krypton or xenon. Some
miniature lamps do not contain gas .
3. Filament
Currently, all incandescent lamps have a tungsten
filament. This metal enables high temperatures
to be reached whilst retaining its solid form
(2 250° C - 2 500 ° C).
4. Filament supports
These supports position the filament within the glass
bulb. They are not always used and their presence
depends on the length of the filament.The greater the
lamp's voltage, the longer the filament.
5. The dumet
The electrical link between the base and the current
input. This part is often used as a wire fuse on 230 V
light bulbs. The dumet is often made from a coppercovered
iron/nickel alloy. The advantage of this alloy is
that its dilatation coefficient is the same as that of
glass. (This is important as the dumets are held in
place by clips made from glass).
2 - gassy atmosphere
4 - filament supports
current input
the base
6 -stengel
6. The stengel
This glass part in a tubular shape enables the bulb
to be filled with gas during the manufacturing process.
It is sealed off once the bulb has been completely filled.
1 - envelope
3 - filament
the button or pearl
5 -dumets
contact
What you need to know
A list of 5 criteria without which an
incandescent lamp cannot be identified:
1. Electrical output (W).
2. Power supply (V).
3. Type of base.
4. Shape and size.
5. The gassy atmosphere (if this is specific).
A compromise between life cycle and
luminosity
Light flow features and life cycle are inseparable
elements. A compromise has to be made between
luminosity and life cycle. The more powerful a
light the shorter the life cycle.