[RedDevil]

One big plus of HIDs is their lower heat production.
When you hold your hand in a halogen beam close to the light you can feel the heat.
With HIDs your hand lights up very brightly but there is hardly any warmth in that.

It has been proven that cars that run the lights by day have 20% less accidents than cars that don't. It does not help the driver; it it just getting noticed earlier by other road users that makes this big a difference. So I often run them even by day. Collecting flies and debris on the lamp housing.

One day when I still used halogens I tried to clear the lamp housing of dead black flies. The plastic 'glass' was scorching hot and I was worried the flies had baked themselves into the plastic. They were almost impossible to remove. At long last they came off with no damage.

I was worried that the brighter light of the HIDs would aggravate this problem, but to my astonishment the lamp glass does not get hot at all. Whatever debris sits on it does not burn in and can be removed easily. When it snows I even have to repeat clearing the units after an hour or so of driving as the HIDs will not melt it away like my halogens did... but I'll take that minor disadvantage with pleasure.