I don't understand why these would be used in place of a HID or a filament type light.

I would consider 7" replacement lights that have a halogen bulb. I have worked with LED's for a long time and while good they have some significant shortcomings for these types of applications.

Kevin


87 Turbo Intercooled Raider, roller cam, torsen rear diff, LSD front diff, lockup auto with modified converter, V6 brakes, low transfer case gears...