Microgreens Grow Help

JorgeGonzales

JorgeGonzales

Well-Known Member
OneHitDone said:
I am skeptical that 4 of those per shelf is going to lay down 300ppfd.
I bet it would take at least 8
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Well, my math was fast, but 4x 48 inch channels, 4.625 inches wide, close together for micro greens, is about 48*4*5 inches, or 6.67 sq ft per shelf, right? .62 meters?

Sooo...That's about 13200 lumens over .62 meters. Let's be conservative and say 13200 * .014 = 184PPF. 184/.62 is...296PPFD.

It's damn sure in the ballpark, unless I fucked up my math.
 
OneHitDone

OneHitDone

Well-Known Member
JorgeGonzales said:
Well, my math was fast, but 4x 48 inch channels, 4.625 inches wide, close together for micro greens, is about 48*4*5 inches, or 6.67 sq ft per shelf, right? .62 meters?

Sooo...That's about 13200 lumens over .62 meters. Let's be conservative and say 13200 * .014 = 184PPF. 184/.62 is...296PPFD.

It's damn sure in the ballpark, unless I fucked up my math.
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Ok, forgot the skinny shelf thing lol
Was thinking 4ft wide
 
S

Seriousbuds

Active Member
JorgeGonzales said:
I have no idea what lettuce needs, I didn't even look at the spectrum, it seemed to come in them all. Why does it grow so well under like 10:1 red to blue if it needs 5000k?

This is the same light, 5000K. Same price. About $150 per 4x4 with a 200W driver. Man, that's like $0.75/W. @Bill Lidgate might be on to something.

http://www.digikey.com/product-detail/en/samsung-semiconductor-inc/SI-B8R221B20WW/1510-1416-ND/5992249
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I really like this idea man, great find!
How would you most effectively power these? I'm trying to avoid having 12 power strips daisy chained together :P

It puts me at about 1,400 watts which gives me plenty of room to fuck around with strip lights if I decide to throw ~$60 on a few hundred feet. I may as well, I see every major production indoor farmer is using these blurple lights so there has to be a reason they aren't running COBs, right? Unless it's just too dam expensive, which is a very likely possibility...
 
OneHitDone

OneHitDone

Well-Known Member
Seriousbuds said:
I really like this idea man, great find!
How would you most effectively power these? I'm trying to avoid having 12 power strips daisy chained together :P

It puts me at about 1,400 watts which gives me plenty of room to fuck around with strip lights if I decide to throw ~$60 on a few hundred feet. I may as well, I see every major production indoor farmer is using these blurple lights so there has to be a reason they aren't running COBs, right? Unless it's just too dam expensive, which is a very likely possibility...
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Apparently Blurple is still the most energy saving spectrum of led?
I'm still waiting to see led put out something like this efficiently
 
OneHitDone

OneHitDone

Well-Known Member
Seriousbuds said:
After re-evaluating my space and consulting with my girlfriend, she's okay'd a bigger setup :clap:. new plan is three shelves, each channel is 4ft long and my total allowable grow width is 30" wide

(I'm actually unsure what I'll end up getting for the width of channels, because I'm looking at chinese knockoff suppliers... NFT channels are expensive!! shipping is the real killer..)

So a total of 98 channels and 14 shelves to light. (the math is weird because I'm building one 6 levels high, and the others will only be 4 levels high.)

My current thought is buying LED strip lights like this http://www.aliexpress.com/item/5M-SMD5050-Grow-LED-Flexible-Strip-Tape-Light-4-Red-1-Blue-4-1-Aquarium-Greenhouse/32564130674.html

It would be the cheapest option by a long shot.... I just can't find anyone who's tried micros with strip lights, so i would be a guinea pig
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You can build your nft channels out of vinyl downspouts. It works great
IMG_9401.JPG IMG_9475.JPG
 
OneHitDone

OneHitDone

Well-Known Member
JorgeGonzales said:
Here is my idea. 4 of these per shelf: http://www.digikey.com/product-detail/en/samsung-semiconductor-inc/SI-B8U221B20WW/1510-1414-ND/5992247

Tell me that isn't awesome. $40 a shelf, 144lm/W. One bar per channel. Easy peasy, just need to figure out drivers. This would probably work for a heatsink: http://www.heatsinkusa.com/2-079/ Ok...just did the math, a 4ft section of that is good to cool 28W of -heat-. You'll probably be around 12-14W, so overkill and stupid cheap.

Just need um, 224ft of it. So now we are at $650 and in need of drivers. And this is where somebody else should step in.
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What would the math work out to on the new 1" profile? (you have all the calculation process dusted off)
http://www.heatsinkusa.com/1-000-new/
If they would work even cheaper yet
 
JorgeGonzales

JorgeGonzales

Well-Known Member
Man how high was I when I did the heatsink math? I multiplied feet * $0.32, not inches.

Yeah I'd go with the 1 inch profile, and it will cost...$430 plus shipping? That makes more sense. Nobody should ever trust my math.

So...figure $30 per hundred watts of power as the Meanwell average, $40 worth of strips, and $30 worth of 1-inch heatsink per shelf.

That's exactly a dollar a watt, which is cheap by any standard.
 
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OLD MOTHER SATIVA

OLD MOTHER SATIVA

Well-Known Member
the 20w 3500 k led tubes we just bought were 16$ canadian delivered so less than 12 usd..thats like .60$ per w

i will get back to you on these .[.it will take time but] they sure look ok..
 
JorgeGonzales

JorgeGonzales

Well-Known Member
OLD MOTHER SATIVA said:
the 20w 3500 k led tubes we just bought were 16$ canadian delivered so less than 12 usd..thats like .60$ per w

i will get back to you on these .[.it will take time but] they sure look ok..
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Well, the nice thing about the Samsungs is the 140+lm/W numbers...so I guess we should be taking that into consideration with comparisons. I know the lights @nevergoodenuf linked are similarly efficient.
 
OLD MOTHER SATIVA

OLD MOTHER SATIVA

Well-Known Member
yes those samsungs are cool

the tubes we got were 122klm/w..

but they are totally self contained units ....that easily link together...

its pretty darn handy and cheap
 
OLD MOTHER SATIVA

OLD MOTHER SATIVA

Well-Known Member
that is a retrofit light..jorge

hongda-led.com

T8 Single Tube light without fixture:
LED tube light,T8,4ft,20W,2400Lm,3500K,AC86-277V,warranty time:5 years
under 5$
we removed the globe and got 50% more lumens
 
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