Changing a flowering room from HPS to LED

GBAUTO

GBAUTO

Well-Known Member
Renfro said:
What light meter do you suggest? Everytime I look at them I get tired of wading through them and most are in LUX. People say that you need different meters for LED and HPS, so I just gave up lol. I do know that @RainDan says the Redwood was designed as a true 1kW DE replacement.

I would jump on those Fatty's but they are a fortune to ship since they are so big, would be nice if I could so a little assembly and not have them ship so costly.
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Searching Gavita's website, it says the 1kwDE produces 2100umolePPF/fixture. The Redwood says it produces 1605 umole PPF and the Fatty does 2097umolePPF. The Fatty is a direct replacement for a 1wDE while using approx 20% less power.
 
oilfield bud

oilfield bud

Well-Known Member
Gquebed said:
I switched from hps to cob a couple years ago. Was disappointed. Two bad runs in a row fucked my confidence up and i went back to hps to regain it. After taking some time off and building a new space for hydro, i went back to the cobs. The first run was not bad considering i know nothing about hydro. This second run was way better. I now know how bad i fucked up with the cobs on the first two runs. Gotta have the room temp right for them and balance the EC to that.

Might be less of learning curve by mixing them with hps....??? I dunno...
If you have the space i would suggest running cob alone in a test area to see what they do on their own, then mix em.

Anyway, im sold on cob now. If you dial them in you can get the same yields as hps or better. Although, dunno if that holds true for de. I never tried those...
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So what did your temps have to stay around to optimize the cobs. I'm also about to do a full switch from hps to cobs.
 
oilfield bud

oilfield bud

Well-Known Member
Ya I haven't got into co2 yet but I'm gonna be getting into 1500w to 2000w of timber lights next month depending on what I can swing lol. But 85 should be easy with this Texas weather haha. Thank you
 
Chip Green

Chip Green

Well-Known Member
I'm personally witnessing another grower, somehow allowing his flower room to sustain temps 90F+ on the daily for WEEKS now, with (so far) seemingly no I'll effects.
I built all his lights, I think he's lost his noodle by running that hot, but it's definitely put me at ease when I see 86F in my zones....
 
Renfro

Renfro

Well-Known Member
GBAUTO said:
Distance isn't a factor in PPF
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Many commercial grow lights provide PPFD values, but omit critical information like the distance at which the PPFD reading was taken. If the manufacturer says their light puts out 1000 µMol/m2/S, that’s all fine and dandy, but how far was the light from the sensor for this reading? Was it 12″? 24″? Taking a single measurement of PPFD is also not worth much either – it’s better to have multiple measurements of PPFD in several different places below the light (what is the PPFD reading in the center? How about a foot out from center in each direction? etc.).
 
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