If you are talking about PIAA type bulbs, ( Halogen bulbs covered with Blue tints ) then I feel you are wasting your time. The blue tint blocks out a lot of light and I feel its a ricey accesory to your vehicle.
Now if you are talking about Real H.I.D. conversions, like the kind I have on my truck...then thats a real improvement in lighting. My lights draw 35watts, and put out 150 watts of pure white lighting. Cost me 700 2 years ago. Now these HID kits are availble for 400-500 bucks. This is the best way to improve night vision.
1. I recommend real HID conversion kits, from Phillips, or OSRAM.
2. Rated as in power output? Rated as in service life? 35watt draw, 150 watt output, Pure white light, A Cool as hell ballast warm up, and last 3x longer than halogen. The color temperature of HID light is close to sunlight, and it gives paint on the road a weird effect, the paint glows as if it was painted with reflective paint.
3. Place of purchase...Try yahoo ''HID conversions''
4. Installation is easy, if your engine compartment has room to mount the ballasts.
You guys are the detailing experts, lighting is my expertise ( flashlights, HID, photo strobes )
