On a 2-door Chevy Cobalt (the ones with the 2 round tail lights on each side). Instead of an incandescent bulb, the owner had put LED's in each one. Normally, these bulbs are only bright dots that don't 'spray' light anything like the incandescents do, making them unsafe. However, I was surprised how well these LED's filled the housings - albeit small - with bright and visible light. I can honestly say they were at least as good as OEM, as there was another 2-door Cobalt next to it at a light to compare. I think the small light housings had something to do with it, but it looked good nonetheless.