Quote Originally Posted by Clunk View Post
well bugger be sideways, you learn something new everyday....... although my park (side) lights are separate to the main lights.

So why is it that with HID headlights, when you first turn the lights on low beam, they take a while to get up to brightness, but when you switch to high beams, the brightness is instant?
A HID (High Intensity Discharge) light works by heating the gas in the bulb to create the light. The "getting to brightness is them warming up to operating temperature.
When you flick on high beam (on a legal projector lens) there is a little blade that flicks down allowing full light through the projector. Normally the blade blocks a portion of the light, thus giving you "low beam" and that nice straight cut off line.