Not a problem at all! I don't expect everyone to read everything I usually skim and look at pictures myself unless im real into the grow lol. To answer your question I would have to say simply wattage draw and trying to keep the lights evenly matched. The 336x is rated to grow in a 4x4 area; the 1w version draws 340w while the 3w draws an estimated 520w.my bad i missed it on the previous page. so what made you go with the 1w penetrator over the 3w?
After I see how these lights run, I may try looking into the Blackstar 900 and I believe GLH is working on a new model which will draw around the 500w mark as well.. that would really be the ultimate test of the top of the lines. Bright side to this test is there are still lights one could purchase that are upgrades of the lights they currently see running.