i got these to replace a set of incandescent marker bulbs on the back of a truck. they work, got the job done, but the rail they were on was quite less robust than the one i removed. i probably should have expected that for the price. but i mean, they DID work. just a peeve of mine. i like doing things that last. im not sure how well this will hold up to years of use/abuse like the original did, but i guess you get what you pay for.