“Great product. Very bright on 5v and gets very hot, the heat sink is necessary if you want it on full brightness and is a little large. I'm using it on about 30% power, runs stone cold without the heat sink and is exactly what I needed for a high level brake light on an RC car.”
“Very bright, very easy to use. Powered 6 of these with 18650s for a beacon project I’m working on. Heat sinks seem a bit overkill but can be cut down by a couple ridges easily”
