4PCS 4-LED Emergency Strobe Light, Red Blue Police Light, Ultra Slim Surface Mount Strobe Lights Flashing Warning Beacon LED Mini Grille Light for Trucks Car Vehicle Police SUV, Sync Feature

Quality built. Clear instructions.

These LED lights are quite small but they are bright. That being said, the lenses don't do much to disperse the LED's directional light pattern, so you really need to be looking at them straight on to see their best brightness. As you get farther away from center, they start to appear less bright. I do like being able to connect them all with the white wire so they can sync up, rather than them all be random. That's a nice feature. They seem to be well constructed.

These lights are easy to install but they're not very bright. I've got 8 of these lights on my truck and 2 vivid lights. My vivid lights completely over power these.

Ok brightness at night, but not very visible during daylight. The strobe patterns are good. Seems well made and waterproof. Not as bright as high quality police strobe leds