Owing to the reaction the halogen lamps retain their initial properties for the whole lifetime
Lower temperatures of colours indicate a higher degree of red casting and higher temperatures indicate the casting of blue. Halogen high beam is reddish, while xenon is bluish.
When it comes to xenon headlamps, apart from the complexity issue described above, the problem is that they emit diffused light when dirty, which blinds the approaching drivers. This is not only the case when we talk of xenon headlamps, but the diffusion effect in their case may be more evident and may endanger road safety. This pertains mainly to the older-type xenon lamps, the stream of light of which is higher than 2000lm. That’s why European cars equipped with such systems need a dedicated, high-pressure cleaning so that any diffusion doesn’t affect road safety. This increases the production costs. Recently, there appeared on the market xenon systems with lower stream of light, which do not need any additional cleaning systems. Automotive lighting manufacturers are gradually moving away from xenon technology and turn towards a cheaper and more efficient LED technology. These solutions will be discussed in a separate material.