Best light setup for yield 20×20 room
- Thread starter Jimmy Verde
- Start date
ttystikk
Well-Known Member
THIS. HPS is obsolete.load it with 315w cmh
Jimmy Verde
Well-Known Member
Really now
Toohighmf
Well-Known Member
Definitely. I have a buddy who taught me at least half of what I know, and was a partner on the Grow above, using a Johnson maximizer. He’s been dealing with light stress and has had to raise his lights and dim it to 50% to keep them healthy. It’s almost light toxicity how powerful & penetrating this white light is. Those of us who are used to 1000w SE HPS for both veg and bloom have to adjust to the PAR of these LEDs. It’s dumbfounding! When we heard about LED’s we wished it well but knew it was going to take 20 years to compete. It’s been 20 years! Yay!
ttystikk
Well-Known Member
315W CMH replaces 500W of HPS. COB LED is even better.
Been there, run that. I am currently watching my city take HPS out of service in streetlights in favor of LED, seriously.
Toohighmf
Well-Known Member
Also, you can put an HLG-550 in an air cooled hood on top the glass and air cool it making it that much more efficient! That could easily remove 1000 BTU’s of radiant heat from the power supply and ambient from the diodes to the glass. To properly cool 9 of em, I’m just running a 2ton mini split, though I’d love to air cool and use half as much AC.. the 5-10% lumen loss is negligible through Glass when air cooling at 16-18” above the canopy.
Toohighmf
Well-Known Member
But 945w easily replaces 2x1000w SE with way more uniformity. It would take 2 Hlg-550’s to compete, Though I’m not sure about the thermal output of 945w of the Cmh vs 1020w of Hlg-550’s. At 39% efficiency, it’s apparent the hlg-550 wins.
ttystikk
Well-Known Member
To compare heat, compare watts drawn.
If I was going to replace two HPS thouies, I'd use 4x315W CMH lamps. That's 1260W vs 2kW. I would spread the lights out for better coverage.
kingtitan
Well-Known Member
my city has completed 90%+, I feel like I should climb one and use it for my grow ROFL
ANC
Well-Known Member
Which why I say COBs are better heat wise as they don't have the IR component that can not simply be sucked away by a ducted hood. Any heat that is not a direct result of radiant light energy from the COBS can be sucked or blown away with the proper enclosure. In my grow room as it stands, that is 500W of heat less added every hour or about 2000BTU.
Lightgreen2k
Well-Known Member
A newbie trying to Jump in the cannabis game big. You see the dolars though.
YOU ARE IN STORE FOR THIS
Hire A consultant.
This is a 20x 20 room.
1000watt covers a 4x4 area
So about 5 - 6 lights perhaps. YOU need to plan out your AIR now. What happens when the summer hits or humdity shifts.
Good Luck with that
andy s
Well-Known Member
have you used them? in a 3x3 tent and also a 4x4 tent to see if it can cover it? everyone i knw that uses them cover a solid 4x4 with them. you saying no and then saying they can cover up to that is really contradicting in a way lol. its like saying a piece of paper covers a 3x3 up to a 4x4, when really its a 4x4 sheet.. get what i mean lol? if you have 3 on each side youll get cross spec thats why i said 5 to 6 lights. so, yes they will cover a 4x4.
andy s
Well-Known Member
theyre not obsolete.. theyre not gonna cause the issues you claim 1000w bulbs do, obvioously cities are replacing them to save enery costs but have to wait years on their return.. kind of baffled by this haha leds are getting better but they still cant match an hps if you have the right set up venting and cooling if need be for your set up.
Jimmy Verde
Well-Known Member
Well that's was rude help nice to meet you lmao I'm jimmy green no newbie here just sething up my new 20 x 20 want to hear opinions problem have seviral hundreds hours of research has not just throwing lights in a room with poor ventilation and praying lmao but totally thank u a ton for your input bro @Lightgreen2k ps it's a winter only grow will never grow indoors in summer lmao I got acres to plant 500 gal's just wanted some. Cool input but I c u nowA newbie trying to Jump in the cannabis game big. You see the dolars though.
YOU ARE IN STORE FOR THIS
View attachment 4050729
View attachment 4050730
Hire A consultant.
This is a 20x 20 room.
1000watt covers a 4x4 area
So about 5 - 6 lights perhaps. YOU need to plan out your AIR now. What happens when the summer hits or humdity shifts.
Good Luck with that
Lightgreen2k
Well-Known Member
Post some pics of your previous indoor grows. Just one or two; what you do for a 4x4 or 4x8 you just replicate on a bigger scale.
The JUNGLE BOYS are right... People see and think ohh im just going go grow some pot. Anyhow what strains have you grown.
Johnny Lawrence
Well-Known Member
You have that backwards.
andy s
Well-Known Member
youre backwards lol jk but honestly ive been riding through the debat ehwich is best for years now.. hps has always been top dog in the business, now that leds are changing and getting better and better while hps lilghting generally stays the same, people only lean towards them for only two reasons, and production isnt one of them. ill keep my one light instead of 3 trying to make up for it. not gonna spend thousands on an led, at the price point they ell at most of the time its not worth it. theyre an investment thats for sure.
andy s
Well-Known Member
and as far as companies or cities changing to led its only bc of the drop in electricity costs.. not bc theyre better haha they arent growing plants for one... and in my experience the suck when replacing an hps or mh. i worked in a factory and they had hps lights and t5s or whatevr the tube lights coould be t whatever, but honestly i absolutly hated it when they switched bc they may appear brighter they dont work when theyre so high up . i cant even see my parts im inspecting its ridiculous. i have to now use a light which before i didnt
Johnny Lawrence
Well-Known Member
Again, you're wrong.
The only advancement in HID lighting in the past couple decades was DE bulbs.
Meanwhile, LEDs(COBs and PCBs) do outperform HID lights. That's not even a watt for watt comparison. They're more efficient, and with current technology, you can replace a 1000 watt light with about seven or eight hundred watts of quality LEDs. That is a fact.
About a year ago, I switched out 2 600s with 950 watts of COBs. I'm getting the exact same numbers I was getting before while consuming 250 less watts. I also don't have to replace Hortilux bulbs every 12 months. Also keep in mind that I eliminated an additional 100 watts when I no longer needed the fan that was cooling the hoods.