Olive Drab Green
Well-Known Member
@KlosetKush You know, the price isn’t that bad for the HLG 135. Like, that’s cheaper than a 100w COB by $15-20.
New to LEDs
- Thread starter KlosetKush
- Start date
Olive Drab Green
Well-Known Member
The HLG 135 is a QB. You asked for the HLG 135.
KlosetKush
Active Member
Yeah I just figured I'd explore the cob just a little more before I commit tomorrow and buy the HLG 135
Olive Drab Green
Well-Known Member
@KlosetKush What kind of space do you need to cover?
KlosetKush
Active Member
About a 1.5x2ft I have about 3 ft of vert grow space
Olive Drab Green
Well-Known Member
Alright, let me get some stuff together. How about
-2x Vero29C, 3500k,80 or 90 CRI
-MeanWell HLG-185H-C1400B Driver
-A heat sink CobKits or someone else might recommend
-COB holder
-Thermal paste
-Build your own frame from extrusions
KlosetKush
Active Member
HOT 135 seems like a better route for me right now as this is only my second go around. I'l consider a cob for my 4x4x6 grow cab I'm gonna make
Olive Drab Green
Well-Known Member
Or!
1x Vero29C
1x MeanWell LPF-90D-54 Driver?
1x Vero29C
1x MeanWell LPF-90D-54 Driver?
Olive Drab Green
Well-Known Member
Yeah, just roll with that, bro. Then, you can expand and add COBs later. Honestly, I am probably going to do exactly that. Get the HLG135 for two of my TastyLEDs to go on either side of.
KlosetKush
Active Member
Do cobs produce more heat than And? I' going for the lowest amount of heat possible for box
Olive Drab Green
Well-Known Member
Probably a tiny amount, but it’s completely negligible. Like, nothing that would negatively impact your plant. I can put my hand on the heat sink and my plants have been within 1-2” of the light due to lack of vertical space with no burn.
Olive Drab Green
Well-Known Member
Remember, HIDs use incandescence (heating an element) to create light. COBs, QBs, and LEDs in general use electroluminescence (current arcing over a phosphor chip to create light.)
KlosetKush
Active Member
So potentially what you're saying is that with the 135 HLG I could run out of vert space and it wouldn't kill my plant of they touched the light or came 1-2"?
KlosetKush
Active Member
Im
I'm aware of the training methods and have started to practice them. But my issue was to seer how close I. Like get my QB to my plants without harm to figure out my absolute lowest I could put it. But I guess I'll have to experiment with my light on that one
NanoGadget
Well-Known Member
If at all possible I'd try to keep it at least 12 inches from the top of the plant. Two reasons for this.. If you look at the ppfd charts I've included from
the HLG website you will notice that at 12 inches the numbers in the center are higher than you probably need. This means an increased chance of bleaching. The other thing you'll notice is that if you get closer than 12 inches from the canopy the ppfd numbers around the edges of the grow space start to fall off noticeably because the light is too close to spread out before reaching the canopy. Is it safe for the plants to get closer than 12 inches? More than likely. But with proper training there is no reason you should have to find out. Hope this helps.
the HLG website you will notice that at 12 inches the numbers in the center are higher than you probably need. This means an increased chance of bleaching. The other thing you'll notice is that if you get closer than 12 inches from the canopy the ppfd numbers around the edges of the grow space start to fall off noticeably because the light is too close to spread out before reaching the canopy. Is it safe for the plants to get closer than 12 inches? More than likely. But with proper training there is no reason you should have to find out. Hope this helps.
KlosetKush
Active Member
Clears things up 100%. Thank you sir!
KlosetKush
Active Member
And for the ppfd numbers correct me if I'm wrong.
Veg 300-700ish
Flower 500-1300ish
Olive Drab Green
Well-Known Member
Right, same with COBs
Olive Drab Green
Well-Known Member
No, definitely not that low. Like, those lower numbers will kind of work, but they will not produce optimally. 600-800 in Veg, maybe as low as 500, but otherwise, 900-1200 in flower. I wouldn’t go lower.
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