The study was divided into PAR38, PAR30 and PAR20 categories -- the three most common sizes of LED reflector bulbs. As more reflector bulbs come to market, each category will have 10 product listings.

Projector headlights are more common in modern cars, implementing a far more focused beam of light on to the road compared to ...

LED replacement bulbs designed for reflector housings attempt to replicate the shape of halogen bulbs, but are limited by the need to mount the diodes to a single-sided, two-dimensional surface.

For a long time I was staunchly against LED retrofits and I always advised people to just run high-performance halogen bulbs if they wanted the best lighting in older vehicles with stock reflector ...