GroErr Grows...

GroErr

GroErr

Well-Known Member
greenghost420 said:
how u liking led compared to the cmh?
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Hey greenghost, it's a tough comparison. I really like LED buds, using them in that small tent for a year or so as they're easier to manage in a small space like that (2x2x4'). The LED's seem to bring out more frost, on some strains. CMH is close though, that JTR I just pulled from the CMH room last night is about as frosty as it gets. I'd say the LED's have a slight edge compared to CMH in frost, but the CMH builds bigger buds/colas in comparison. imo it's the intensity/spectrum and some extra heat on the canopy that builds bigger buds/colas with the CMH. That tent has a total of 260w, 200w of 3000k LED COBs + 60w DIY panel with a mix 2700k CFL and 4000k LED bulbs. The spectrum combo builds nice tight buds, big difference than when I was running only 3000k in there. Cheers.
 
GroErr

GroErr

Well-Known Member
Here's the LED tent/SOG at Day 52, another 5-7 days, both strains are ripening and tightening up quick. Nice smell in there between the very strong/spicy Blue Dream and sweet/fruity THC Bomb. Nice amount of bud in there for 6x 1gal pots :)

Not in the pic but threw the party cup I had in the 12/12 from seed comp in there last night (PPP x BB), it's a male so I'll be growing it out and collect the pollen from it. No worries about pollinating these ladies as they'll be done before any pollen starts flying. Not the best timing for this male as I have a couple of these PPP x BB phenos in veg waiting for the tent. Will figure it out over the next couple of weeks depending on how fast this male flowers.

Group:
LED-Tent-Day52-1.JPG

Blue Dream:
BlueDream-Day52-1.JPG
BlueDream-Day52-2.JPG

THC Bomb:
THCB-Day52-1.JPG
THCB-Day52-2.JPG

Cheers :bigjoint:
 
GroErr

GroErr

Well-Known Member
greenghost420 said:
yea im leaning towards the cmh, are you getting close to the same yeilds with the led vs cmh?
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No, the CMH is better production in my case but these aren't the highest efficiency LED's that I'm running in that tent. it's just for extra clones or breeding so I'm not concerned about numbers in there. imo the CMH would compare close to Cree 3070 or higher series COBs for efficiency and production per watt, but the CMH works out quite a bit less per watt, about $1.60 per watt for the Sun Systems, cheaper ($1.00/watt) if you go bare bulb like some guys have done here. There will be costs later like replacement bulbs but even changing them "often" would be about $80/year as these Elite Agro's have a 20,000+ hour life rating, there are 4380 hours @12/12 in a year, you could go up to 2 years with a single bulb before any significant deterioration. DIY COBs will run around $2-$2.50 per watt all-in (cooling, heat sinks, cobs etc.) and higher end panels like A51 or Apache will typically run in the $3/watt +. The CMH is a nice option but you'll need a good 5ft room/tent height bare bulb and 6ft for a reflector setup like the Sun Systems to dissipate heat properly. They're very cool for this type of technology but not as cool as high efficiency COBs or high end panels.
 
a senile fungus

a senile fungus

Well-Known Member
GroErr said:
No, the CMH is better production in my case but these aren't the highest efficiency LED's that I'm running in that tent. it's just for extra clones or breeding so I'm not concerned about numbers in there. imo the CMH would compare close to Cree 3070 or higher series COBs for efficiency and production per watt, but the CMH works out quite a bit less per watt, about $1.60 per watt for the Sun Systems, cheaper ($1.00/watt) if you go bare bulb like some guys have done here. There will be costs later like replacement bulbs but even changing them "often" would be about $80/year as these Elite Agro's have a 20,000+ hour life rating, there are 4380 hours @12/12 in a year, you could go up to 2 years with a single bulb before any significant deterioration. DIY COBs will run around $2-$2.50 per watt all-in (cooling, heat sinks, cobs etc.) and higher end panels like A51 or Apache will typically run in the $3/watt +. The CMH is a nice option but you'll need a good 5ft room/tent height bare bulb and 6ft for a reflector setup like the Sun Systems to dissipate heat properly. They're very cool for this type of technology but not as cool as high efficiency COBs or high end panels.
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I've got my 315w CMH in a medium sized batwing reflector and I can still touch the reflector directly above the bulb.

Mine run soooo cool. I'd say its about 20" away no problem so far. Love em. Much cooler than my fluoros. My next veg space planned for them will be two side by batwings like this | | and not this — — in a 3x6 space.

I really need to start a thread or journal or something.[/QUOTE]
 
GroErr

GroErr

Well-Known Member
a senile fungus said:
I've got my 315w CMH in a medium sized batwing reflector and I can still touch the reflector directly above the bulb.

Mine run soooo cool. I'd say its about 20" away no problem so far. Love em. Much cooler than my fluoros. My next veg space planned for them will be two side by batwings like this | | and not this — — in a 3x6 space.

I really need to start a thread or journal or something.
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Yeah, pretty cool running for this tech. I can set my hand on top of the Sun System reflector after a 12 hr cycle and it's barely warm to the touch.

You got the bulb and ballast through advanced, then a separate batwing reflector from e-bay or the like. No adapters or anything required so this is probably the least expensive DIY option for a reflector setup.~$300. If you're running 120v then you'd need a step-down converter which runs ~$50. The Sun Systems run ~$450 - $500 depending on whether you're buying the 120v (more expensive but includes the built-in 120v converter) or 240v straight up.

When I looked around comparing this DIY option compared to high end hps setups it's not far off price-wise, but a much better option all around imo, particularly for heat.

RE: thread - pics or it never happened - lol
 
giggles26

giggles26

Well-Known Member
I think it looks like chocolate lol.

Its so terpy and sweet. I love it and so does the wife. I dropped a lil chunk in the bong, sat next to her and she thought I had cracked open a jar lol. She's like damn that smells so good.
 
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GroErr

GroErr

Well-Known Member
giggles26 said:
I think it looks like chocolate lol.

Its so terpy and sweet. I love it and so does the wife. I dropped a lil chunk in the bong, sat next to her and she thought I had cracked open a jar lol. She's like damn that smells so good.
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Does look like that, sounds like your wife might get into those chocolates, better put them under lock & key :)
 
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