I am upgrading to MH and will need to supplement I think. I am not concerned about the diferences in PAR but am thinking that I want to have as much flourescing as possible. Both retro kits are nearly the same price. Anyone know the best bulbs/retro to get the most flourescing? I had always thought the VHO with URI superactinic was the "best" but with technology advances, I would rather hear from some of the more experienced folks.