Review on YITAMOTOR LED Light Bar 2PCS 4 Inch 27W Round LED Light Pods: Versatile Off-Road Flood Beam Lights with Waterproof Design, Ideal for Trucks, Tractors, Boats, Motorcycles, ATVs and SUVs - 12V 24V, 2 Year Warranty by Steven Wood

I looked at these headlights inside and out. You seem very tough. The electronics are filled with optically transparent adhesive. Even when submerged in water, these lights will continue to function. Electronics can be problematic as they are more complex. As others here have seen, they seem to work without problems for a long time. The downside is that the color on the outside of the aluminum is not up to standard. Upon arrival I found a few nicks where the paint had already fallen off. The paint peels off easily, leaving a half-colored light after a while. I recommend the model with the best coloring. (I know what that was supposed to say, considering most of those lights on Revain are clones.)