Ridiculously bright while only taking 64 watts on the power meter. This lights up a large area in my garage and takes a fraction of the power of the old florescents it is replacing.It does get hot, about 70 F higher than ambient at the back of the aluminum heatsinks after running for an hour. I have a couple others that do the same thing, and they survived our very hot summer with no issues, so I don't think it's an problem.Nice thing about these is they need no rewiring, just screw them in a reSee full review