astronautrob
Well-Known Member
You can find much cheaper T5 fixtures than the one you posted. $22 for one light is steep, you can get a 4 light fixture for around $60
What to buy $$
- Thread starter MrDangerYeild
- Start date
jeepster1993
Well-Known Member
Grams per watt has a lot to do with a lot of things.
How big, how long was the grow, how much light, how much topping, genetics(most important to high yield)...
CannabisNerd
Well-Known Member
My buddy on here was getting 3lb with gg4 under a de with 12 plants i believe vegged for around 4 weeks, I could be wrong on veg time though. But I hear everyone is getting 1lb easy with the 315cmh and upwards to 1.5gpw on similar runs. That's just bonkers to me, I mean I can get 2lb on a regular 1000w with 4 week veg time, 12 plants per light, but that's x3 315cmh lights worrth of light, so the cmh just sound super efficient for the yield they get. I don't know much about led though but that's pretty awesome if they can do similar to a de or 315cmh gram per watt
CannabisNerd
Well-Known Member
Also, to note, a 1000w se hps footprint is about 4x4 while the cmh is 3x3, that's crazy. Same amount of watts of cmh would cover a 9x3 area, that's wild haha
Porky101
Well-Known Member
DE is not hot as shit. Not atall. I don't know why do many people say this but my plants are 1ft away from my 1150w DE open hood and they are 84f on the tops using IR sensor.
I would say that cob runs really cool in comparison though.
I don't think it's fair to say cob will out yield another light watt for watt. Yes watt for watt it does absolutely. But for the money required, you can do a run with a few DE hps then buy all the cobs then profit! So I would use the hps to pay for the cobs. I wouldn't start off with cobs..
MrDangerYeild
Well-Known Member
Trippyness
Well-Known Member
Here is an example why COB Wins:
For example purposes, lets say that the DE hits 1GPW and the LED hits 1.5GPW ( Average)
1,000 Grams for the DE = 2.2LBS
1,500 Grams for the LED = 3.31LBS
In Money terms in my area in Canada a LB goes for 2k.
DE = $4,400 wholesale
LED =$6,620 wholesale
Thats a $2,220 difference per harvest.
If 4 harvests a year, thats $8,880 per 1,000w of COB over DE.
LED pays for itself first grow.
For those who grow for personal reasons thats 1.11LB difference per harvest. Could be more or slightly less depending on genetics etc.
So for all intensive purposes, COBS our preform DE.
As for the heat of DE... not sure if your bulb is broken or your ballast isnt running it correctly but DE gets very hot.
I have been in a room with King Wing DE HPS and it was crazy hot without serious AC. Ask anyone, DE is hot as hell, considerably. I dont know anyone would would run a 1k regular HPS open hood at 1 foot without a cooltiube or coolhood and or a mover. So you saying that you run a DE no cooling open hood at 1 foot is absolute bullocks.
I have run a 1k that close to plants, burn and heat stress the shit out of them.
Please do take us a photo of a DE HPS at 1 foot from plants with a Temp meter at plant level. Would love to see this.
How much AC you running in that room? On a mover? If you were on a Mover and have serious AC I could see it, but surly you would bleach the plants.
CannabisNerd
Well-Known Member
Yeah they are pretty hot. I don't know how hot but I have to run X2 6" intake fans that blow outside temperature air to cool 6 of them. Canopy stays at 80 and fans intakes come on and off every 5-10 minutes or so. But the canopy is 3.5' below the bulbs. In the summer I reckon a big ass 36k btu mini split would be needed to cool it. Haven't run them in the summer yet, but am planning a mini split install because I know it would bake the plants with out one haha
CannabisNerd
Well-Known Member
At 1' above canopy, with a de, I feel the plant would fry in 1 day
Trippyness
Well-Known Member
Agreed, someone is blowing smoke out the ass.
Trippyness
Well-Known Member
Scrog would be a great idea, but I assume he want the least work.
COB fixture would solve his issue with reflectors.
ttystikk
Well-Known Member
This whole thread is goofy. Look- you haven't even told us how many watts those things pull, so there's no way to tell if that's adequate lighting.
Second, an 1150DE is total overkill for the space in the pic. But, I guess if all you have is a sledgehammer, the whole world looks like a railroad spike. Not hot my fucking ASS, btw. Shit.
With the wattage of LED in the tent, you could replace those two lights with a 315W CMH system and come out even or ahead in terms of heat.
But none of the above answers the question you really asked, do they?
You wanted to know how to get light deeper into the plant. The solution isn't necessarily more light- again, no numbers means no answers. Rather, it's to remove some of the leaves, specifically the lower fan leaves.
CannabisNerd
Well-Known Member
Agreed with ttystikk - plant training can do wonders. Tie the plant down sideways and problem solved. Then remove some leaves for air flow, light penetration and you might not have to change a thing
Porky101
Well-Known Member
Not one inch. One foot.
I have 4x 1150DE HPS. With 2x 8 inch centrifugal fans out and 2x 6 inch fans going in.
Temps are max 84F.
No Aircon. Run lights at night time and my temps are fine!
I have no doubt watt for watt LED produces more... But when people are saying "it's soo hot" I don't get it... Mine are not that hot... Yes they are definitely hot but they aren't hot enough to fry the plants... Not at one foot!
My hoods are air coolable if needed. But I read that DE hps needs to reach a particular running temperature otherwise they don't perform to their max. So I am not air cooling my hoods but I have the option too incase I want to.
Porky101
Well-Known Member
No ac.
No light mover.
100,000 lux at the tops using a simple lux meter.
Plant leaves are 84f +-
Will post some pics
Trippyness
Well-Known Member
No way. Even a regular HPS 1 foot away no ac or mover will fry a plant. DE will do the same +.
I have no further comments at all.
Either your setup is broken or your trolling.
Trippy out.
Trippyness
Well-Known Member
I would honestly be super surprised. Not being a dick, its just extremely unlikely.
Please upload a pic with the DE and temp.
What model are you rrunning? Gavita, Nanolux? Your own build?
If your own build what bulb and ballast.
Just very odd that your 1.5 foot away no air removal or ac with descent temps.
When I ran HPS I had my 1k at 1 foot no air and my teemps with 35-40C... not sure how a DE would be better. Makes no sense.
I know a few people with Gavitas and they are Hotter than HPS. Hence the distance from Canopy.
Trippyness
Well-Known Member
Here is a thread regarding heat and Gavitas: https://www.rollitup.org/t/gavitas-are-they-really-worth-the-price.886492/
@Carolina Dream'n who is a very well know member and is affiliated with a grow shop.
I cant see you having a DE thats less hot than a HPS.