THanks for the info Dougal. I can't believe I didn't think of the Y adapter thing, pretty good idea. I think I will get two of those bulbs and a Y adapter and see what happens. The cost of 2 of the 6500K bulbs is about the same as the 2700K so I really have nothing to lose. I only have like 4 plants at a time in veg, so I have enough sockets to do one light per plant, so each plant is getting the 4200 lumens by itself.