I'm constantly amazed at how many people think "bluer = brighter." It would be more accurate to say "bluer = more obnoxiously irritating." My human eyes, evolved to see by yellowish light, perceive those blue HID "conversions" as irritating, and I may say "D***! His lights are bright!" But as I found when I purchased a car with blue bulbs, humans do NOT see better by bluish light.
I spent significant money on "real" HID projector headlamps, designed from the start for the HID light source, and I'm happy with their performance. I went out of my way to be sure they were "white" HID, no more than 4,200 Kelvin. They flash bluish for a moment when turned on, but very quickly turn white. Their clean low beam is nice in fog. I must confess to supplementing them when on deserted rural highways in the middle of nowhere, with one of the H7680X HIR halogen spotlights on my old former cop car (honest, Officer, I'll stop doing that just as soon as I install my nice Cibie halogen auxiliary lights:naughty
. I don't perceive the color as that much different. And my eyes see very well by the light from halogen lamps.
I read a lot posted on motorcycle forums about HID "conversions," even looked at beamshot photos. They appeared to have "more light," but all of them had worse low beams, more light scatter above the cutoff. Whether on my bike or in my car, I can quickly tell the illegal HID jobs on bikes; they're irritating even in daytime, throwing glare where they should not.
I'm not opposed to HID lamps, if they are designed to be HID lamps. I purchased expensive aftermarket HID driving lamps for my bike (again, 4,200K, I returned the 5,000K bulbs). But my very best option for the headlights at the time was the factory style and wattage bulb in the Philips Xtreme Power version. Beam control is excellent. Relays and heavier gauge wiring round out the plan.
I just can't wait for the "blue fad" to run its course. Maybe someone will market a light yellow LED "moon ring" lamp, and that will be the next craze...
FWIW, I'm guessing it won't be long before the State Revenue Collectors, in the big white cars with blue lights, figure out a way to make lots of money from "headlight tickets." Someone will market a reasonably affordable gadget for checking color and measuring glare a given distance from the light and given height above the road (maybe one of the companies that sells RADAR/LIDAR to cops and RADAR/LIDAR detectors to drivers). I'll keep watching the Gall's Supply and L.A. Police Gear catalogs.