Originally Posted By: MrHorspwer
Originally Posted By: Stu_Rock
CAUTION---HIR2/9012 bulbs can cause glare when used in many cars.
The HIR2 doesn't have a full blacktop, so there will be glare if the car does not have full bulb shields.
The HIR1/9011 bulb would be a valid replacement for the 9005 high-beam application, where no blacktop or bulb shield is necessary.
Listen to Stu, he knows what he's talking about.
Look at your low beam lamps. If it does not have a shield completely covering the front of the bulb, do not use an HIR bulb. I am pretty sure your Cutlass falls into this group, as it uses lens optics to form the beam pattern and most do not use a bulb shield. HIR will be fine in the high beam lamp.
IMHO, the next best thing to an HIR is the Philips Xtreme Power bulbs. These do have a painted bulb tip and can be safely used in lamps without a bulb shield.
My LeSabre does have a bulb shield. It's covering the front and sides of the bulb. When I line up 20 feet from a wall, I get 2 distinct patches of light from the low beams, as DOT designs allow. And, the glare is a lot less than 9005 bulbs in the same reflector. I've had both, and recommend the HIR over the 9005 since the glare is much less pronounced.
I agree on the Xtreme Powers being the best 9006 bulb, if someone insists on a 9006.