Operating principle

Xenon lights stand out for their greater light efficiency, above that of halogen lights.

The type of xenon lights currently available provide, in the form of lighting power, triple the light supplied by

conventional halogen lights. Their absorption, 35 Was compared with the 55/60 W of traditional halogen solutions,

also decreases CO2/km emissions.

The function of these lights is not based on the principle of the traditional "incandescent lights" and this is precisely

whey there are defined as "cold". They are also referred to as "gas discharge" and are part of the HID (High

Intensity Discharge) family.

In these new-design projectors, the traditional incandescent lights have been replaced by a higher performance

option that exploits the gas discharge principle between the two electrodes. It consists of a glass or quartz tube with

two tungsten electrodes at the ends, filled , after having vacuumed, with high pressure Xenon gas (inert gas).

The lights are turned on by a high intensity discharge with a voltage of approximately 25000 V to the ends of the

electrodes, which, surpassing the dielectric rigidity of the gas (limit where the gas loses its insulation property,

acting as a conductor, allowing the passage of electric current) contained in the ampule, allows for the ignition of

this discharge. In turn, this vaporizes the substances contained within (mercury, metal halides) due to the raising of

the temperature, generating a flow of high frequency photons that give rise to a very bright, intense light with color

temperature similar to that of sunlight (ranging between 5,000+6,000 k).

By using Xenon lights on a vehicle, the Highway Code prescribes the use of a headlamp washing system as

compulsory, in addition to an automatic beam directing system. when talking of Xenon lights, it is fundamental to

be aware of the compatibility of the various bulbs available on the market, with those used on the ca . It is

important to pay close attention because in some vehicles, particularly more recent, technological vehicles, there

is a "Check Control" system that detects failures and anomalies involving bulbs. This is why replacement of a bulb

with another that is not compatible may cause malfunctions.


Since 1998, ECE R48 regulations require an offset of the vehicle inclination caused by the various different load

conditions. The aim is to prevent any risk of glare and ensure excellent lighting beam. Due to the increasing light

levels, for Xenon projectors, automatic inclination control is required. The axis sensors identify the chassis angle.

Subsequently, and electronic control unit calculates the vehicle's inclination and compares with a predefined value.

The light beam adjustment motors then work to maintain the correct position of the projectors in the various

different loads and different conditions.

WARNING: The makes and distinguishing signs of the vehicle manufacturers included in this document are only provided to inform the reader about the potential suitability of the said TEXA products to be used for the vehicles of the above-mentioned manufacturers. References to makes and models contained in this document are to be considered only as a rough guide.  

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