Seeking Help - Building Custom-Designed DIY LED Grow Lights using CREE CXA3070 COBs

Gaius

Gaius

Active Member
Great helpful pioneering there Mello. The adhesive method may be easier, but if you upgrade you have to get new sinks. Not too much extra work there for the easy upgrade ability though.
 
SupraSPL

SupraSPL

Well-Known Member
That COB holder looks very pro!

Mellodrama said:
OMG -
The forum wouldn't allow me to add 10 minutes of typing so here's the rest...
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whenever the forum gives me a hard time for editing a post I have to "go advanced" and enter the captcha info, then when i finish in the advanced tab it asks for another captcha.

Mellodrama said:
I wanted it in the thread full size but I guess that'll work.
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Try tinypic.com and link the code to get full size pic in the thread

[quote="Mellodrama, post: 10234389"]Problem with the 120V cords I had was that none of them had polarized plugs.[/quote] I used to buy the 99 cent extension cords from walmart and just lop off the outlet side. Can never seem to have enough of those laying around. Lowes has them too but I think the prices have been going up.

[quote="Mellodrama, post: 10234389"]In the US the narrower blade is the positive blade. So that goes to the + side of the driver's AC IN. The broad blade goes to the - side of the AC IN. Then it was just a matter of connecting the driver's DC OUTPUT correctly. "L" is positive, "N" is neutral.[/QUOTE] I switched these in the diagram to make sure it is clear.
 
hyroot

hyroot

Well-Known Member
Mellodrama said:
This whole deep red subject - it sounds good but I don't understand the application. Is this something you'd want running all day with the other lights? Or is that the bandwidth you use when you're simulating sunset, and you only run it for a half hour or so at the end of the day after the other lights have turned off?
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emerson effect 660 / 730 increases energy of chlorophyll b. 660 will also improve flower size. run the whole time.. to create sunset 730 only for 5 min after lights out.
 
Gaius

Gaius

Active Member
I'm looking for ways to mimic what indagrow is doing with the pontoons. I think I could do it with easily with a couple timers.
 
Gaius

Gaius

Active Member
midgetaus said:
you tried to replace a 1000W light with a 190W LED
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You don't have all the facts so please don't post negative comments in my thread before you know the whole picture.

I compared flower development of clones from the same plant in nearly identical environments. The only difference was the light, number of plants, canopy size.

With the 1000watt, I flipped 9 plants and had a 5x5 canopy. With the XGS it was 4 plants flipped at 2x2 canopy. Temps were actually 5 degrees higher during the HPS grow, which should have put that grow at a slight disadvantage. Both times the plants were trimmed below the second node and vegged for three weeks, so penetration shouldn't have been an issue with the thin canopies.

I can tell you that the XGS was just no comparison. The area 51 fanboys here just don't like to hear anything but good things about their much-coveted lights. Well I'm sorry but the XGS I own is a good all-around light, but just not ideal for flowering. The company even confirmed this themselves.

Anyhow Midge, if you would like more info about the comparison I'd be happy to talk to you in PM, but it's not really on-topic for this thread. Only reason I said anything was because the thread dropped 2 stars immediately after I reported on the XGS performance in another thread. Just some petty retaliation that I thought was amusing.
 
hyroot

hyroot

Well-Known Member
Gaius said:
You don't have all the facts so please don't post negative comments in my thread before you know the whole picture.

I compared flower development of clones from the same plant in nearly identical environments. The only difference was the light, number of plants, canopy size.

With the 1000watt, I flipped 9 plants and had a 5x5 canopy. With the XGS it was 4 plants flipped at 2x2 canopy. Temps were actually 5 degrees higher during the HPS grow, which should have put that grow at a slight disadvantage. Both times the plants were trimmed below the second node and vegged for three weeks, so penetration shouldn't have been an issue with the thin canopies.

I can tell you that the XGS was just no comparison. The area 51 fanboys here just don't like to hear anything but good things about their much-coveted lights. Well I'm sorry but the XGS I own is a good all-around light, but just not ideal for flowering. The company even confirmed this themselves.

Anyhow Midge, if you would like more info about the comparison I'd be happy to talk to you in PM, but it's not really on-topic for this thread. Only reason I said anything was because the thread dropped 2 stars immediately after I reported on the XGS performance in another thread. Just some petty retaliation that I thought was amusing.
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that doesn't apply having a smaller canopy / space. You need to match par for par. The 1000w is putting out almost double the par of the 190. It would take 3-4 190's to match the same par with spectrum blend. even your cob set up will not match the par of a 1000. Your logic comparing the 2 just doesn't work.. Now if you compared the 190 to a 160 that works as a comparison. They have closer par numbers and cri. When comparing 2 light sources. They need to have similar output. You should invest in a par meter.
 
Gaius

Gaius

Active Member
hyroot said:
You should invest in a par meter.
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Funny you say that, because I did just today. Gonna be fun!

I never claimed it to be a fair comparison, in fact I even said it was unfair. That said, look around at all the people claiming the a51 lights can match 400w or 600w HPS lights.

Don't make me summon Jbone on you, Captain Popcorn.
 
hyroot

hyroot

Well-Known Member
Gaius said:
Funny you say that, because I did just today. Gonna be fun!

I never claimed it to be a fair comparison, in fact I even said it was unfair. That said, look around at all the people claiming the a51 lights can match 400w or 600w HPS lights.

Don't make me summon Jbone on you, Captain Popcorn.
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you messed up. He is like beetle juice but you only have to say is name once and he's not funny. You don't even have to say his name even. Just saying the term troll brings him about.

what's this captain popcorn you speak of. Its not me. I always pull big dense buds.

I haven't used a 190. But a 160 will out perform a 400. The 160 has higher par than a 600 and higer cri but smaller coverage... 2 160's will beat a 600. 3-4 160's will match a 1000w.

one thing hps has over led is almost even par numbers across the canopy with very little drop. Leds have a major drop on the outer end of the canopy. Multiple small panels help compensate for that. That's one thing I really dig about the inda gro's . They have the least amount of drop in par numbers across the canopy . Plus very high cri.

check out multipasses 190 grow. Looks amazing so far. Him , me and psuagro use the same vegan nutes. I swear those plant based nutes and rock dust in there are like magic for plants. Its unbelievable. Really no bullshit.

I want to grab an apogee myself. Other investments come first. I will have one in my hands eventually..
 
SupraSPL

SupraSPL

Well-Known Member
I get what you are saying gaius. You can grow 1000W HPS sized buds in a micro PC grow with LEDs if the light intensity is there. And then you can scale it up until it matches 1000W HPS in in total yield if you choose to. I normally aim for bud size equivalent to my 600HPS buds but if I increase the intensity in the same sized canopy I could get 1000W HPS sized buds. KNNA taught us way back that photosynthetic efficiency takes a hit as you increase intensity so there is a happy medium. I have suspected that bud quality takes a hit also. Same goes with fertilizer. If I fert for maximum yields I lose some quality. Everything is a trade off it seems.
 
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