Diy FOTOP grow board 280x900x2.0mm (L29.52"xW9.18")

[Randomblame]

Does anyone know if the 312 boards from meiju can be ran without a heatsink and what current can they be ran at passively?

With a bit airflow inside a tent.... probably up to 100w!

 

[Aolelon]

Got my lights from alibaba today, they appear to not be lm561c s6 bin but for the price it was a good deal. The heatsinks will allow me to use HLG qb as well

 

[Moflow]

SS2 has been defoliated of fan leaves and is fer the chop on Tuesday, hopefully.

The 2 CBD Crews Critical Mass CBD day 32.
Two phenos
The sativa like indica....



The indica sativa

 

[Rocket Soul]

Here's another PAR Map.
View attachment 4107735

We have recently had time to test this board with a hydrofram par meter and i can more or less confirm the numbers at 200w and 300w per board. What we found lower wattage (50% dimmed hlg185-48A) is that the light levels drop of drasticly, to much less than half. Not sure why .But maybe our drivers dimm more, not sure as we only have max and min of dimming as refernce point. In any way happy with the boards at 200w, 2 of them over 1m2 tray with spread out cannopy blows hps/cmh away. In about a month we have some plants flowering under them.

Thermally, they work fine at 200w each with no heatsink.

 

[Moflow]

We have recently had time to test this board with a hydrofram par meter and i can more or less confirm the numbers at 200w and 300w per board. What we found lower wattage (50% dimmed hlg185-48A) is that the light levels drop of drasticly, to much less than half. Not sure why .But maybe our drivers dimm more, not sure as we only have max and min of dimming as refernce point. In any way happy with the boards at 200w, 2 of them over 1m2 tray with spread out cannopy blows hps/cmh away. In about a month we have some plants flowering under them.

Thermally, they work fine at 200w each with no heatsink.

@Rocket Soul , thanks for taking the time to post your test results.
At least they've been tested twice now with similar results.
What distance are you running between the boards?
What distance from the plants?
That's one FOTOP board per driver, hlg 185 48A that your using?
Have you any idea as to the FOTOP Boards efficiency from your testing or using the Samsung calculator?
Still, the boards were for a cheap enough price and I can attest that they can grow a good crop.
Thanks again.

 

[Rocket Soul]

@Rocket Soul , thanks for taking the time to post your test results.
At least they've been tested twice now with similar results.
What distance are you running between the boards?
What distance from the plants?
That's one FOTOP board per driver, hlg 185 48A that your using?
Have you any idea as to the FOTOP Boards efficiency from your testing or using the Samsung calculator?
Still, the boards were for a cheap enough price and I can attest that they can grow a good crop.
Thanks again.

Yeah, 1 hlg185-48A on full per board, 30 cm/12'' between the boards gives us between 800-1000 par about same 30 cm to the sensor. 40 cm more even around 800. The wattage at board level should be slightly less than 200w, the drivr is speced at 3.9 amps.
Sorry about no exact numbers on current and volts, only broke out the par meter and temp gun. Just a temproary setup right now, will be getting stoff framed nicely within the next month. It will be ny friends first led grow, brought about by very high summer temps recently. The room next door is with lec 315s. We will see what works best for his situation.
Going beyond 300w the board heats up seriously. But nice and only slightly warm at 200.

 

[Moflow]

Day 40 of 12hrs on 12hrs off for the 2 CBD Crews Critical Mass CBD
After chopping the SS2s I put these directly under the FOTOP Boards.
They were around 8" - 200mm away from the UV violet leds and I also realised the timer wasn't working properly and they were on for 12hrs!
Ive turned off the uv and raised the lights to 12" - 300mm as I think one of the plants was stressed with maybe the start of foxtail.
They stink to high dough.
I think they'll be finished faster this time as it's warmer now.

 

[Randomblame]

Yeah, that's an UV damage example par exellence. Burned leaf margins..!
Seems more foxtailing is also an effect of UV, see my GreenPoison chopped last week.
But seems also strain depending. A SuperLemonHaze (last 3 shots) in the same tent doesn't look like this.

 

[Moflow]

@OLD MOTHER SATIVA did you ever finish that plant that you were doing for 20 weeks for medicinal purposes?

Nice looking plants @Randomblame, I see you're using hydroton, what watering method are you using? Have you smoked any uv bud yet?

 

[OLD MOTHER SATIVA]

yes..i coulda done it better..but under 5000k it was easily as good as any other cri...

it basically cured on the vine and despite not being terpy it was probably more potent than any sample i took from it along the way..plus it had a good... rich..not necessatily definable taste

 

[Randomblame]

Thanks, mate!
Unfortunately I've not tried it yet! Only a bit of "scissor charras", but that is nothing to judge about the final potency... Bud's are still curing in the freezer and I'll leave it there for at least another two weeks.
But I already had the GP's before I've used UVB, so I can draw a good comparison here when curing is done..
With the naked eye there was no visible difference, IMO, and I broke my macro lens, (stepped on it, I dumbass) and I have such a stupid new dual lens camera now on my OP6, so I can't use the lens anyway.

And yea, it's hydroton...
But it's only a ~1-2" top layer powdered with diatom earth to exterminate shitty fungus gnats coming with the soil.
The layer also helps to keep the soil surface moist so the roots can use all the soil available.

 

[BuddyColas]

yes..i coulda done it better..but under 5000k it was easily as good as any other cri...

it basically cured on the vine and despite not being terpy it was probably more potent than any sample i took from it along the way..plus it had a good... rich..not necessatily definable taste

Just a test? Or will you be doing more 5k runs?

 

[OLD MOTHER SATIVA]

i have the 5ks..they are in service and doing well....

doing too much r and d to let plants go 24wks again

one day i will focus on something other than grail sativa search

 

[OLD MOTHER SATIVA]

i just attached 12 Estonian strips[first samsungs i ever bought]
to an 18 x 26 in hd baking sheet..
i removed the middle strip [ hard w thermal tape] so i can [if i want] mount a fan on top and go higher wattage..these are 4000 k i think..not that i care..

imho after you have anything from b-c s [whatever]
at any cri..the rest is really up to what you do with em..how you hang em

and your grow talent/environment

don't over think things just get growing

 

[Moflow]

Day 46 for the CBD Critical Mass.
Another 10 days for these. A bit battered from the UV but it'll harden them....
I put them to the side of the room and slotted in Sensi Star original and the two Royal Gorrillas.

CBD Crews Critical Mass CBD 2 plants, 2 phenos


Sensi Star original clone day 26 flowering

Ŕoyal Gorrilla RQS from seed 26 days flowering.


The Royal Gorrilla is quite tall and the stems are firm so I've used bamboo supports.
The Sensi Star original I could tie in knots.
When I chop the CBDs I'll spread the branches out more.

 

[Moflow]

I've reduced the grow area temporarily, by movable walls to a 4ft x 4ft - 1.2m x 1.2m and I'm now running at 470 watts at the wall. 30 watts per Sq ft.
The 2 x FOTOP BOARDS are running at 238 wall watts and the rest of the wall wattage - 232watts is spread over 2 gg boards and a 288 Quantum Board.
2656 mid range diodes. The plants are loving it.

Day 40 of 12hrs on 12hrs off.
2 x Royal Queen Seeds Royal Gorrilla plants
1 x Paradise Seeds Sensi Star original .

Royal Gorrillas at back, Sensi Star original at front.

Lights are 8" - 10" from the Gorrillas and around 16" from the shorter Sensi but the gg board is directly over it so par readings are quite even.

Royal Gorrilla



Sensi Star original


Royal Gorrilla



Sensi Star original



Enjoy

 

[Moflow]

Just for reference.
Sunshine at 4.00pm today

And in the shade at 4pm.....

 

[Randomblame]

Wow, only 15% difference between center and wall measurings!
If you had told me that 10 years ago, I would have called you a liar .., lol!
Much better is only possible with additional sidelights.

I would like to see boards or strips with a closer diode spacings at both ends and wider spacings in the middle, would be simple way to increase the brightness at the ends by 10-20%.
I've only seen one light to date using a similar design to even out the coverage at the ends. The Envolve700 from ProGrowTech.

 

[Moflow]

Wow, only 15% difference between center and wall measurings!
If you had told me that 10 years ago, I would have called you a liar .., lol!
Much better is only possible with additional sidelights.

I would like to see boards or strips with a closer diode spacings at both ends and wider spacings in the middle, would be simple way to increase the brightness at the ends by 10-20%.
I've only seen one light to date using a similar design to even out the coverage at the ends. The Envolve700 from ProGrowTech.

The only way for me to make the light fixtures throw an even nicer even spread would be to invest in a couple of better fitting drivers with dimming capabilities, I think, instead of those China drivers
I really need to use 2 x GrowGreen boards in parallel on the meanwell hlg 185 1050. Maybe re jig the FOTOP Fixture, make it 3x3 and put the ggs in the centre of fixture and dim them to fit the FOTOP par readings but haven't had much time at moment.
Ive a few cxbs and 1212s lying in corner gathering dust too! Lol

 

[Moflow]

I always remember this diagram from a few years back,for an even light spread with cobs v a Gavita DE