uvb was used so .6 is correct if you're wanting to include the uvb wattage in the calculation.
I've been using the 400w diamond series and it's been pretty good to me so far. I want to get a second one for my 4x4 area. When I told the guy at advanced I was thinking about throwing three in there he said it would be overkill.
day 27. bubblegum under the diamond series and some blackstars pointing sideways, and on the far right is some more blackstars