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Thanks for the links / help, the wikipedia page looks like a foreign language, the second link makes sense.

I understand the parallel / series part, just getting the right driver combo is still foggy. I figured asking here wouldn't be a huge burden on anyone.

so you can run 3 cmx22 in series on a HLG-185H-48A driver? I think I asked this before but cant find it. I think maybe they need to be in parallel?

here are my blueberry at 7 weeks 2 days. I wish I could get pics like some on here, don't have a cell phone or a good camera.

Are auto just as potent as regular? I thought they weren't for some reason. Only grown one and I'm sure I didn't give it the right stuff, ok but gave it away. (they liked it for free)

I feel stupid that this is hard to grasp, if I want to run 5pcs 50 w 32v/36v cobs at 40w each what driver would do this? preferably with dimming so I could go down to 20w each. The 40 w is just a approx, plan on just a finned heat sink so didn't want to much wattage. I think maybe a hlg-185h-700...

Yours looks like it has more crystals.

Thanks, I like the lighting aspect but there is a lot more than light required I'm learning. Just started growing indoor 3-2017 so total rookie but getting better slowly. (i hope)

Yes, they are on for the 15 mn at lights out. Here's a pic showing the top lights better. Someone mentioned burning the terps away if the light is to close? Right now they are approx 12" / 15". According to the mega crop info they claim the plant only uptakes what it needs so having N all the...

Here are some blueberry I'v got going, week 6 yesterday, these pics were from week 5. Have been using mega crop every other water at 2 teaspoons per gallon. With the mega crop there is no changing the ratios of anything, they get everything all the time. The leaves have some claw to them, hairs...

ok

here is the veg room qb's, as usual too many plants. 4ea qb 120 4000k on top and 4ea qb120 5000k below on the clones and seeds, dimmed way down to 40w. The clones are loving them, I know overkill but working good.

here's some pics of the flower room. These are 38 days from flip. I trimmed the lower growth alot, even the small nugs below are very hard. They also get 15 min of far red at light out, they are on a 12-12 cycle.

Have 4 blueberry's going under 4 qb120 3000k, 2 qb288 3000k, 4ea warm white cheap cobs 100 w run at 50, 4ea full spectrum cheap cobs 100 w run at 50. That's the overhead lighting, also on the lower walls are 10ea 36", 18 w ebay grow light fluorescents. Ditched the Kind 750 but got $550 for it so...

Makes perfect sense, but I don't think hlg / .... says to do that, I just used screws with no washer but assumed that the conductive area wasn't directly under the head. Looked like they left a good margin around the outer mounting holes, not sure about the center holes in some boards.

heres the veg side, as usual i have to many going, getting ready to clone a bunch of these. I tried manifolding on a couple 3x crazy, thinking of putting them in the flower room on 4-20 +- when the blueberries come out.

Here's what I've got so far, held up on the other 288 fixture but I may not need it. I did add a 200w ceramic heater that is on for 8 hrs a day since the room was getting down to 56 deg with lights out. With the stretch maybe i should trim the top fans to let the light further down?

Yes, humidity dropped into 20's / 30's, from the 50's.

I do know that my room with no plants and lights on gets 10 / 20 degrees hotter than when there are 4 in there.

Thanks for the suggestion, sounds like a good idea but I had already cut all the lower growth off already. I'm in the process of modifying the flower room, going to mothball the kind for now and use 4ea quantum 288 boards 3000k, 4ea) quantum 120 boards 3000k. and my 2 cob fixtures, one full...