Samsung F Series LED Strip Build for a 3x3' (links for ALL parts inc.)

skoomd · Mar 16, 2018

Just posting this light I just made, expect to see a lot more from me in the coming weeks as I get my strawberry banana seeds in and grow em under this bad boy. Plan to run Nectar for the Gods as well

The goal of this light was to strive for insanely good uniformity to help with canopy penetration and prevent any kind of light stress/burning from being too close (a common problem with fewer sources of more powerful lights).

What do ya'll think? I gotta clean up some of the wiring, but it's pretty much all complete.

Tent temps max out at 79f (74f ambient) and the temp of the strips is 45-50C measured directly center of the strips.

SPECS:

10x Samsung LT-F562B 2′ Strips, 50/50 mix of 3000k and 3500k
1x Mean Well HLG-320H-24B Driver
1x 100K Ohm Potentiometer
10x 24" strips of 1" aluminum heatsink (i used u channel for my last build, the heatsink has way better thermal dissipation so far)
2x 30" pieces and 2x 24" pieces of aluminum L frame
1x roll of thermal double sided tape to mount strips easily
~3 feet of red/black 14g stranded tinned copper wire for wago to wago connections
~8 feet of black 18g solid core copper wire for poking into strip connectors easily
A bunch of 5 slot wagos
5-15p NEMA cord 18g
Waterproof connector for power cord
Total power: 313w tested from wall
Efficiency: 52.9%
PAR Watts: 165.57w
PPF calculated: 808 umol/s
Estimated PPFD @ 18": ~900+umol /m2/ s
COST: $405.95 SHIPPED TO ME

nfhiggs · Mar 17, 2018

Very nice. Good to see ya here Skoomd!

I'm getting ready to do a Sammy build too. Got 6 of the 2 foot F series. gonna do a 150W 24"x24" light for my veg space, so I can retire the Roleadro Panel.

skoomd · Mar 17, 2018

nfhiggs said:
Very nice. Good to see ya here Skoomd!

I'm getting ready to do a Sammy build too. Got 6 of the 2 foot F series. gonna do a 150W 24"x24" light for my veg space, so I can retire the Roleadro Panel.

Hell yea. Im gonna try to mediate my microgrowery posts onto here as I love this community!

6x 22" strips will blast a 2x2' space, youll definitely wanna dim em. Sadly I cant afford a par meter but damn I can tell with just my eyes that this setup for 36"x36" is just an insane amount of light. I have a 4x4 running these babies too, 3 weeks into bloom, but sadly the partener im working with wants no pictures upaloded, bud i can tell you i am blown away. Fuck hps, this is how you grow. I cant even tell you how many people still try to sell me on hps. DEHPS is not bad, but you need a TON of ceiling space so its out of the question for me atm.

nfhiggs · Mar 17, 2018

skoomd said:
Hell yea. Im gonna try to mediate my microgrowery posts onto here as I love this community!

6x 22" strips will blast a 2x2' space, youll definitely wanna dim em. Sadly I cant afford a par meter but damn I can tell with just my eyes that this setup for 36"x36" is just an insane amount of light. I have a 4x4 running these babies too, 3 weeks into bloom, but sadly the partener im working with wants no pictures upaloded, bud i can tell you i am blown away. Fuck hps, this is how you grow. I cant even tell you how many people still try to sell me on hps. DEHPS is not bad, but you need a TON of ceiling space so its out of the question for me atm.

The space is actually bigger than that - 24 x 39 inches. The fixture will probably be more like 24 x 18, to give it a little space all the way around. I fucked up and ordered 22" heatsinks instead of 24" so I'm not sure how I'm gonna frame it up yet.

diyled · Mar 17, 2018

Great build but the numbers are way off . You would need double the amount of strips to get 2.58 umol/j

With 16 strips on a hlg-320 its est 2.5 umol/j

Randomblame · Mar 17, 2018

Yeah, calculations seems a bit over estimated.

LM561C - A1/S6 - 3000K @65mA
VF: 2.9V (max)
Flux: 34.5 lm/W (min)
QER: 4,86 μmol/J
LER: 321,6lm/W
-> 2.766 µmol/J (2,8 @60mA)

F-Series Gen3 3000K@1120mA
QER=4.86 µmol/J
LER=321.6 lm/W
= 2.54 µmol/J

HLG-320H-24B has 13,2A so each strip gets ~1,3A. The 2ft. F-strips have a 8s9p layout, so ~144mA per diode. I would rather calculate with 2,4μmol/J or 2,2 @ system level.
BUT, it's still a very good light, mate! Nice and clean, with even coverage and I'm pretty sure it will grow some nice bud.

ANC · Mar 17, 2018

Does your calculator have a way to include driver losses?

skoomd · Mar 17, 2018

diyled said:
Great build but the numbers are way off . You would need double the amount of strips to get 2.58 umol/j

With 16 strips on a hlg-320 its est 2.5 umol/j

Oh? I was using 170 lumen/w with 5% driver loss. Didnt even factor in the 15-20c cooler temps (samsung strip specs are taken at 65c)

170 lumen per watt divided by 321.6 LER = 52.8%

52.8% of 313 = 165.264 par watts

165 * 4.86 QER = 803 PPF

Oye..... ok maybe i did forget to factor in loss

knight mare · Mar 17, 2018

I have some of the F564b's in 4k and running them at 116mA per diode you get 188 L/W with 6% driver loss.

ANC · Mar 17, 2018

I think the drivers are about 93% at full load... so you need to add a few percent.

knight mare · Mar 17, 2018

I've checked the driver I use and mine is 94% according to mean well.

skoomd · Mar 17, 2018

I forgot I shaved off the driver loss from the overall wattage draw of the build already, so I actually think the original numbers are still in line.. Maybe subtract another 2-3%. The total draw from the wall is 328w, so I shaved off 5% to get the strip power. But at 8% loss (driver rating), im at 301w. So 770 PPF.

skoomd · Mar 17, 2018

nfhiggs said:
The space is actually bigger than that - 24 x 39 inches. The fixture will probably be more like 24 x 18, to give it a little space all the way around. I fucked up and ordered 22" heatsinks instead of 24" so I'm not sure how I'm gonna frame it up yet.

Oh dang. You might be able to make it work once you get the heatsinks on a frame to widen it a little bit. But i'm not sure. If there's a way you can mount the top of the sinks to your frame, you should be okay as long as you fit the strips to the sinks really well so there's no overhang.

Randomblame · Mar 17, 2018

166,6lm/w at 1,32A and ~156,6lm/w at system level(without optical loss)

ANC said:
Does your calculator have a way to include driver losses?

Yes, it does!
http://www.samsung.com/led/support/tools/engine-calculator/

ANC · Mar 17, 2018

Oh, you are just using standard samsung engine calc.... OK.

Randomblame · Mar 17, 2018

You can try this tool to calculate intensity at different heights. Simply apply the numbers above, dimensions and canopy distance...
It is a nice tool with which you can calculate the required distance to get your desired 1000μmol/s/m².

http://dev.edman007.com/~edman007/pub/par-dli-cal.html

ANC · Mar 17, 2018

yes I use those both quite often. I thought You had another calculator.

skoomd · Mar 17, 2018

That's the first time ive seen a calculator for the actual strips and not just the diodes, thanks for posting. Helps a ton actually.

nfhiggs · Mar 17, 2018

skoomd said:
Oh dang. You might be able to make it work once you get the heatsinks on a frame to widen it a little bit. But i'm not sure. If there's a way you can mount the top of the sinks to your frame, you should be okay as long as you fit the strips to the sinks really well so there's no overhang.

Yeah, there's a couple of different ways I might go, just haven't sat down and worked it out yet.

Randomblame · Mar 18, 2018

skoomd said:
That's the first time ive seen a calculator for the actual strips and not just the diodes, thanks for posting. Helps a ton actually.

Yeah, he is relatively new, found him a half year ago.
The second link from post # 16 is also useful, as you can directly take over the numbers of the Sammy calculator and convert them to PAR numbers at different heights....

Samsung F Series LED Strip Build for a 3x3' (links for ALL parts inc.)

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