Why you shouldn’t always trust manufacturer’s lumens specs
LED lumens are used specifically by LED projector manufacturers, but are not a standardized form of measurement. The ...
Hackaday13y
Building A 1300 Lumen Bike Light
He has no trouble lighting his path with this 1300 Lumen bike light he built. The light source is a 3-up star by Cree. It puts off a lot of light, but also generates quite a bit of heat which is ...