I bought these headlights to replace traditional incandescent bulbs. They're as bright as my van's headlights, maybe a little brighter, but they're not dazzling. It's nice that you can test them with a 9-volt battery at the plug - that makes troubleshooting easier.
This was a simple replacement for the light bulbs on my trailer. Installation was easy and the light quality is excellent. No visibility issues and as crazy as it may sound, they're just plain fun to watch! Highly recommended.
I found very little information on this before ordering but I'm glad I took the risk. The headlights are very bright and well designed. Each light is an LED, unlike some that use an incandescent bulb for the side markers. I use them on a boat trailer and since installation they have been fully submerged in water maybe 5 times with no shorts or water infiltration issues. The only issues I've encountered are the location of the cable exit on the back of the case and the ability to properly ground