Damn its bright, I did a test fire, it starts out a sickly green, kinda reminds me of latrine in new orleans....called boubon street, after it kicks in it has a slight yellow tint, but mostly its a crisp, super bright white, I cant look at this one at all, my 15 k, you didnt want to stare at it, but if you caught it in the reflector, it wasnt bad, this is a totally different story, so far I believe the par value, I'll have a final verdict in about 2&1/2 weeks, that'll give it the 100 hour burn in,and the color to dial in, from what I've read it typically gets a good bit whiter,much less yellow, which so far is just a tinge, for just the brief time I spent with it, I like it a lot so far, you wouldnt want to use it solo, but with the actinics, its what I was looking for, colors pop out, and it looks like high noon instead of the creeping in of dusk, only real niggle so far, is it makes growth on the glass stand out a whole lot more, gonna have to figure out a way to floss the hard to reach areas