Review on SAE Class 1 NanoFlare 3.5" 3W Yellow Amber LED Strobe Light Head With 33 Flash Modes For Emergency Warning And Police Use - Sync-Able And Surface-Mounted Grille Light For Trucks And Vehicles by Eddie Man

I purchased this to use as an extra attention-getting brake light for my motorcycle. It is exactly as described. And it is VERY bright. In fact, it has a feature I don't recall being mentioned, a high and low intensity setting. I would probably have regarded it as unnecessary, but as it turns out it is perfect in this application. I put a switch in place that I refer to as the Day/Night switch, allowing me full intensity during the day, and the lower setting when I ride at night. The high intensity would be blinding to a driver right behind me at night, but the low is perfect. I am very pleased with this product. I suppose the only remaining question is longevity and of course only time will tell. You should be aware that the various functions require the attachment, sometimes momentary, of different wires. Mine is wired to my brake light, so I didn't need an On/Off switch. But if you want to be able to change the flash patterns (I picked one and kept it), or in my case the intensity, after installation, additional switches will be required.