Just bought a HLG 100 for my 2 x 2 x 4 grow tent, replacing my underwhelming Big Bloom. It says to hang it 12 inches min. from the top of the tent. I can run a fan on it if I want to hang it higher to protect from overheating.
At the recommended 24" from canopy veg stage it seems very do-able, but I don’t think I’ll be able to maintain 18" during flower, even with my normal LST.
Anyone have suggestions about this light, or lighting in a 2 x 2 x 4 grow tent?
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You’re going to run into same issues with just about any light in a 4’ tall tent. It would probably be in your best interest to use training methods and keep your plant short and wide.
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10 - 4. Thanks. I’ll do more research on LST and give it a shot.
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I run my hlg 100’s 15 inches from canopy, 12 in flower. 4ft is tough, good luck man
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Thanks for that info. 15 and 12 is def helpful. I’ll put some creative effort into my next LST. Understanding there would be a smaller yield - I’d like to try a 12 / 12 light cycle and see what happens. Maybe 5 weeks into veg would keep the plant(s) shorter?
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I also figure you can get away with a few inches between top of tent and light, the driver and light don’t get very hot, place your hand above and see when its comfortable. I don’t know anything about LST, just keep in mind that they will double hight once they go into flower. If you run 12/12 they will go into flower automatically when they become of age, usually in 3 to 5 weeks. I am in taller closet and I just top once and flip at a certain hight.
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Thanks, this is very helpful. I’m excited to set up the HLG.
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No necessarily. A wide flat plant should outproduce a one stemmed vertical plant.
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Agreed. My 2 grows using basic LST blew my mind. so many buds at same canopy level. I needed more space and better lighting, and everything else.
But I’m going to battle the 2 x 2 x 4 tent for a while. The challenge suits me at given time!
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Did you get a dimmer with the hlg? Can place 1 in circuit if didnt. Would help a lot if cant achieve distance.
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I was told that’s a no go 
How you going about it??
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This is what I was told…
I understand, I’m just not sure how to do that. If you were able to, it wouldn’t be as simple as just adding a potentiometer. Meanwell dimming drivers that are dimmable by resistance have a different circuit the pot is installed on. The models that don’t have the circuit aren’t dimmable by resistance. You could maybe get it to work with a triac, but meanwell doesn’t rate it for triac dimming,
All a dimmer is is a dialable resistor. Can place in line positive side to driver. Also check the driver for a dimmer under a rubber cap on side.a lot of meanwell can be turned down at driver.
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Right on, my big drivers have the plugs, my 65 has nothing
I think hlg sells dimmer for their boards. Have to make sure driver can take it. I would callem.
Just looked up what theybstick with the 100. Not dimmable at driver. That bites. Have to look at all solutions…
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I just got comfortable running at 100% and raising or lower as needed like HPS days before digital ballast
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@StonedCold13 gonna ask my son when we chat. He will know for sure if can change either input or output. Pretty low tech for what he does for the Navy.
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There we go 
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I too was gonna put a knob on my out put side since it’s DC figured what the hell, then got told no. So I stopped there
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