So I'm not to keen on ground lighting, nor do I need them for any "rock crawling" application. I have a 2004 Dodge Ram Cummins, which is not going crawling on any trails. I've been researching functional solutions to add under hood lighting that actually serves it's purpose, rather than the tiny, halogen bulb that has less output than a candle.That being said, I looked into LED strips, then I came across these. The way they throw light would be perfect. I took a gamble on them and they work GREAT in their application. Now I can see when I work under the hood without trying to awkwardly put a light somewhere balanced at the perfect angle, or a flashlight in my mouth.I wired a on/off push button switch to activate them.They seem to have a sturdy construction too them, compact, and the rubber bumper that comes with them is nice for installing. Although, the bumper that came with them is rounded on the bottom, for mounting to a bar...there is no rubber bumper that is flat for mounting on flat surfaces, you would just have to mount the light to the surface, which would be an issue because you would need a hole in the surface for the wire to run through. They should have included a flat version of the rubber mount as well.Luckily for my application, the round ones worked fine since I was mounting them on the corners of sheetmetal radii. But, proof is in the photos, these things are extremely bright. No camera trickery here, shots were taken back to back. Although the shot with them off makes it look like it's still light out, that was the camera tying to capture as much light as possible in the dusk. The photos of them lit up represents the true outside darkness.I can't comment on longevity yet of these but they seem to be sturdy and for me at least, they will be out of the elements.