muleface
Well-Known Member
Whats your budget and grow area?
DIY with Quantum Boards
- Thread starter robincnn
- Start date
Doctor Derp
Well-Known Member
Day 33 for these Double Grape ladies underneath 1000w of QB304 sexiness.
InTheValley
Well-Known Member
hey guys, any general idea of par at 18inchs with 4pc QB120? ran at 1500ma?
thanks,
thanks,
Humple
Well-Known Member
Nope, but I'd like to. Let's sweet-talk LEDGardener into doing another experiment for YouTube.
Edit: Alternatively, I could just stop procrastinating, buy a lux meter, and do the math. But I'd still like to see that video.
muleface
Well-Known Member
Here is my math on this. If yours is better please post it.
LX x .014505 = umol
umols / 1,000,000 = mols
Mols x 60 x 60 x 24 = mols a day
An example
33781 lux × .014505 = 490 umols
490 uMols = .00049 Mols (umols / 1,000,000)
.00049 Mols x 60 seconds = .0294 (a minute)
.0294 x 60 minutes = 1.764 (an hour)
1.764 x 24 hours = 42.056 mols (a day)
So if you are shooting for 38 mols a day you run your light for 20 hours
This is the part that may need tweeking.
LX x .014505 = umol
Im not sure .014505 is the right number. Someone gave it to me
LX x .014505 = umol
umols / 1,000,000 = mols
Mols x 60 x 60 x 24 = mols a day
An example
33781 lux × .014505 = 490 umols
490 uMols = .00049 Mols (umols / 1,000,000)
.00049 Mols x 60 seconds = .0294 (a minute)
.0294 x 60 minutes = 1.764 (an hour)
1.764 x 24 hours = 42.056 mols (a day)
So if you are shooting for 38 mols a day you run your light for 20 hours
This is the part that may need tweeking.
LX x .014505 = umol
Im not sure .014505 is the right number. Someone gave it to me
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Budzbuddha
Well-Known Member
nfhiggs
Well-Known Member
Its close enough to get you in the ballpark (~10%) for lower CCT white LED lights.
Humple
Well-Known Member
3000k. It's a better all-rounder.
Budzbuddha
Well-Known Member
AND .... Better than 3500k
I would choose to research what the different spectrums have to offer. It might just be, someone giving the advice prefer another spectrum because it may suit their needs more.
That being said, I'll go with 3000k for my stuff.
Gl with yours
Sleezygeezy
Well-Known Member
Any1 building or lighting with a qb120 board need to check out this little driver. Up to 75watts, 90% effecient, dimmable, cooler to the touch than the qb120 they are driving, and $12.80 b4 any discount at arrow. U will need a multimeter or killawatt so u don't overdrive. At 20.43v, it's lighting with just 28ma/0.57watts. At 24.67v, it's pulling 2.45A/60.44watts. I e-mailed HLG and was told not to push more than 72watts per board(at board level). At 60watts the board is measuring 25 degrees warmer than the driver. Each at their hottest point.
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Sleezygeezy
Well-Known Member
My bad. For any1 not wanting to open that pdf, the driver is an LRS-75-24.
Stephenj37826
Well-Known Member
I'm sure everyone is going to get right on that......
coreywebster
Well-Known Member
http://www.cree.com/led-components/media/documents/ds-CXB3590.pdf
Page 10.
It only compares 3k,4k,5k but you can see there's a nice amount of blue in any. Remember we are not talking CFLs when looking at the Kelvin. Its white light, it has to have blue in it.
That said for all rounder I would go with 3500k just because so many have used them with great success.
crankz1
Well-Known Member
Sent an inquiry through the site about the 3M adhesive you guys recommend for the Ledil optics.
Maybe you could just post the part number here for everyone.
I used arctic alumina.
It works, but kinda a PITA to do more than a few lenses at a time...
Some 304s with 60 degree
Along with a couple 3590s and a 315 CMH spinning around on a Sun Circle over some green crack @ 5 weeks 12/12
Plus, it's surrounded by 8 120s run soft @1050 for some upskirt action...
Anxious for board restock!
Cheers
Maybe you could just post the part number here for everyone.
I used arctic alumina.
It works, but kinda a PITA to do more than a few lenses at a time...
Some 304s with 60 degree
Along with a couple 3590s and a 315 CMH spinning around on a Sun Circle over some green crack @ 5 weeks 12/12
Plus, it's surrounded by 8 120s run soft @1050 for some upskirt action...
Anxious for board restock!
Cheers
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I really like that the qb120 don't require a heatsink and want to order 4 to run in 2x4 flower tent but also read that 2 QB288/304s are better for the space. Hmm my budget is not large. Really hoping to get a set up for less than $1/watt and want to keep it under $350-400. Any help would be great.
