If that is a true 100 watt (everything but the title says 20 watt) Its going to be the power of a thousand suns in terms of brightness. I think it is a "100 watt equivalent" that only uses 20 watts. If that is the case it would be fine. If the cri is 97+, It is dam good, but i think they are lying.
If you would like a list of approved leds by the guru's, check out this thread: