I've been doing a little re-thinking on that, and I'm gonna pop in a new bulb every 12 weeks. I think the lumen output will still be enough for my needs then, and maybe save a little coin on bulbs, although I'm gonna go by my meter. As soon as it hits a certain point, the bulb is getting changed. I have a pretty crude light meter, but it's good enough to pick up the change I'm looking for I guess, we'll see. My main thought in all of this is to just keep the girls as happy as possible really, and to keep the density I'm looking for. I do have the new hood, so that should also help I would think, especially if I keep it as clean as possible. The Blue O.G. is already kicking out pistils everywhere, happy to see that. I have a pretty good rotation worked out with 5-6 girls at a time in the flower tent, and 8 plants downstairs in veg, with 6 being female seeds, the other 2 are my Bay 11 regs. I have a BubbleGummer, Yumbolt47, Cindy99, Skunk#11, Green Poison, and another Iced Grapefruit. All of them with the exception of the Skunk#11 are really happy and vegging right along with at least 2 mains tops so far on them. I say with the exception of the Skunk#11 cause the dang thing looks kind of crappy and always has some sort of problem. My Skunk#1 from G-13 Labs is the least needy plant ever, and this Skunk from Dutch Passion is much more sativa dom, and has to be the most finicky plant ever. I've never had problems with any strain like this one in my life, and I'm completely serious about that. It was a freebie, and I just wanted to run it , but this thing is breaking my b@ll$. IDK we'll see. The Cindy99 I have going has some of the thickest, widest, darkest leafs, quite interesting for something that's suppose to be sativa dom. I've ran Cindy99 from G-13 Labs before, and it was not this indica dom. I know G-13 Labs are a bunch of strain rippers, but I'm not sure what's going on here for sure, like I said I grew this before, and it was not like this. The phenos were always more sativa dom, and not variable to a large degree. They were all pretty uniform in leaf structure, more of a height difference than anything else. I think in another 4 weeks the Green Poison will be ready to take the place of the Skunk#1 or other that's done. I like her leafs, really kind of a 50/50 with quite the nice veg speed. They say only 50 days or something for flower, so her and the Cindy99 should finish quickly for me I hope. Like I said earlier i have a pretty good rotation going, and some meds should be coming soon. I put alot of thought into the girls I'm running and also when, so that I should have both indicas and sativas to suit all my needs. Thanks for stopping in everyone. Peace and Love.