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AUTO PARTS
Catalog
Auto Parts / A136 | Automotive bulbs
Gas-discharge lamps
1
2
3
4
H7
5
6
D2S
Gas-discharge lamps generate light Better visibility Reduced energy consumption
using an arc Gas-discharge lamps generate Thanks to their lower energy consumption
The glass bulb is filled with the noble gas 2.5x more light than conventional bulbs. (35 W instead of 55 W), less fuel is required
Xenon and a mixture of metal halides. Because of this increased light emission, than for conventional bulbs. This benefits
The very high voltage causes the gas to they also illuminate those parts of the road the environment and is something you will
ionize between the electrodes and it begins that cannot be lit by halogen bulbs. notice at the gas station.
to glow. Complete ionization of the particles The light is so bright that it is comparable
normally takes several seconds. to genuine daylight. This means that the Longer service life
To achieve the full brightness immediately driver can see road markings and signs The state-of-the-art technology employed in
when starting, an electric ballast unit much earlier, while the Xenon light is very gas-discharge lamps results in a service life
supplies an increased “starting current” to comfortable for the eyes. several times longer than that of con ventional
accelerate the particle ionization. Once the bulbs. The latter can also fail because of
full light output is reached, the bulb current problems at their weak point – the glow fila-
is restricted. ment, which can also be damaged by severe
vibrations or shocks.
The modern operating principle of gas-
discharge lamps needs no glow filament,
a fact which increases their durability and
reliability.
1 UV inert-gas bulb
2 Electrical penetration
3 Discharge chamber
4 Electrodes
5 Lamp base D2S = Gas-discharge lamp (arc)
6 Electrical lead-through H7 = Halogen lamp (filament)
Bosch Automotive Aftermarket 2010 | 2011 / Auto Parts
