max ppfd hlg 350

4 x 350R = 3880 PPF
2 x 600Rspesc = 3058 PPF

4 x HLG 350R produce 26.88% more light than 2 x HLG 600

In my 4x8 been advised to get 4 350rs and dim them to start...

Ppfd calculator i found says 2000ppfdmax in 4x8

I use co2 also. So is this overkill a waste of money. or am i able to utilise it all like hl advise?

Will be using 2400watt light replacement with each replacing a 600 but replacing my hps watt for watt . Will this double the yields or is there a plateau ppfd and yield?
Ive seen the 300 pull similar to 600 so the 350 should nobrainer it.
Also seen the 4x4 1200watt 52oz dudes

I wonder after seeing heatha flipflop and double ds 86oz plants from 900watt flipfloping makes me curious if it is possible by increasing the lights distrobution?

3000ppf approx would be maxing out a 8x4 if it's well spread out. Those 4 x 350 will give you enough spread and light and then some extra. I think I've seen some do a whole 4x4 with 4 diablo boards and 400w.

As for yield, it's about grower skills to take benefit of all that light. You'll need to have environment and feeding on point when you grow at +1000ppfd.

Rocket Soul said:

3000ppf approx would be maxing out a 8x4 if it's well spread out. Those 4 x 350 will give you enough spread and light and then some extra. I think I've seen some do a whole 4x4 with 4 diablo boards and 400w.

As for yield, it's about grower skills to take benefit of all that light. You'll need to have environment and feeding on point when you grow at +1000ppfd.

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Im organic grower with a 400litre soil bed of pure goodness has everyrhing there ever needed and more hehe. Trust it smashes my hydro system time yield quality and maxed co2. I am years over a deccade growing with good skill pushed insane under my hps 0.5 to 1.2gpw yields. strain dependant. 0.5 is when i run my orage strain she is very very light lol.
Current run will be close to gpw with new strains .



So the extra 800 ppfd is it worth the extra board for 100ppfd useable extra ?

It's worth having 4 of them for the spread and for height: if you turn those up completely, which you'll need to do in flower, you're looking at 24" hanging height, which makes it hard to grow tall plants if you're in a tent. Having 4 of them, on slightly lower than max will give you an easier time at growing.

Rocket Soul said:

It's worth having 4 of them for the spread and for height: if you turn those up completely, which you'll need to do in flower, you're looking at 24" hanging height, which makes it hard to grow tall plants if you're in a tent. Having 4 of them, on slightly lower than max will give you an easier time at growing.

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What i thaught and future proof. My next i will go tentless and rock the sidewalls i wana walk with ma ladies

2cent said:

What i thaught and future proof. My next i will go tentless and rock the sidewalls i wana walk with ma ladies

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This setup should also work fine for a 5x10 if your thinking you might expand.

FYI, HLG recommend height is 15" during flower and 24" during veg.

BlandMeow said:

FYI, HLG recommend height is 15" during flower and 24" during veg.

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You're right, I was very surprised when I saw the parmaps. I was expecting much bigger numbers based on parmaps of the 288s at 12"/ 120w. Even compared to some alibubbers offerings; have a look at this par map of the Fotop board using lm561c from a few years ago (thx @Moflow ):

Ok so it's at 12" but only 200w and it gives you pretty much the same: flowering intensities for a section of approx 3x1.
But It does it with less power, and cheap: 80$ the board, no heat sink needed and about 50 for a driver.

When it comes to Samsung tech, running more diodes / boards, at max efficiency, always means better par coverage, using less power!

piratebug said:

When it comes to Samsung tech, running more diodes / boards, at max efficiency, always means better par coverage, using less power!

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Yeah, but in this case we have less diodes (800 versus almost 1300) ran at less wattage (200watts versus 330 for the hlg) and using a less efficient diode (equivalent to the hlg v1, if even that). Getting spread up and hanging height down seems to really make a lot of difference.

Rocket Soul said:

Yeah, but in this case we have less diodes (800 versus almost 1300) ran at less wattage (200watts versus 330 for the hlg) and using a less efficient diode (equivalent to the hlg v1, if even that). Getting spread up and hanging height down seems to really make a lot of difference.

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I totally agree with you, and I wasn't trying to argue the point you were making. All I was trying to say, is that it is always better to use a lighting array that has more didoes, directly covering more of the physical area, running at max efficiency, then to use a lighting array that has less diodes, and is covering less of the physical area directly, and will need to use more power to match a setup that is using more diodes and less power!

Hello guys…don’t mean to hijack the thread but I was wondering if you could give me your two cents on a set up that was recommended to me for a 4x4. What do you think of running 2 x HLG 350r in there? How does that compare to a spider farmer se5000? Any other better recommendations maybe ? I wanted a quantum board kit that I have used in the ost made by HLG but they told me they no longer make them today. The 350r was suggested to me.

Bombaclatt5000 said:

Hello guys…don’t mean to hijack the thread but I was wondering if you could give me your two cents on a set up that was recommended to me for a 4x4. What do you think of running 2 x HLG 350r in there? How does that compare to a spider farmer se5000? Any other better recommendations maybe ? I wanted a quantum board kit that I have used in the ost made by HLG but they told me they no longer make them today. The 350r was suggested to me.

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I’m in a similar boat, the other option would be the hlg 650 r but I’m starting to lean towards the idea of dual 350r which would give more even coverage across a 4x4

Blue brother said:

I’m in a similar boat, the other option would be the hlg 650 r but I’m starting to lean towards the idea of dual 350r which would give more even coverage across a 4x4

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If the light or any components die on you, you can still go on "reduced ofc" with a single board.

My friend that runs LED grows bought 2 HLG 300L Rspec instead of the HLG 600 Rspec, he had a light die on him in flower, so having the boards separated means you can still go on with operations while waiting for replacement.

I went with the dual 350r in a 4x4 setup and love it, had to back off 2 clicks of the dial from full power. Ive got 1 new new Diablo and 1 standard 1

Girls looking good and healthy

Btw you could hook them up together for easy adjusting both up and down with aluminum rail on both sides, thats what my friend did with his.

Something like this.
https://www.osram.com/ecat/LTS-SLIMTRACK-PROFILE System-Accessories-Linear Flexible and Area Lighting-Digital Systems/com/en/GPS01_3474175/ZMP_1057009/

shocked there is no stress lol, i have 350r for 3x in a 4x8 and had to run 50% 7 cliks made some strains purple off

armani1980 said:

Girls looking good and healthy

Btw you could hook them up together for easy adjusting both up and down with aluminum rail on both sides, thats what my friend did with his.

Something like this.
https://www.osram.com/ecat/LTS-SLIMTRACK-PROFILE System-Accessories-Linear Flexible and Area Lighting-Digital Systems/com/en/GPS01_3474175/ZMP_1057009/

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That’s a good idea thanks. Hopefully they don’t need much more adjusting though, I wanted them separate to accommodate for different strains at first but now I’m using a scrog net so there’s no need

Blue brother said:

That’s a good idea thanks. Hopefully they don’t need much more adjusting though, I wanted them separate to accommodate for different strains at first but now I’m using a scrog net so there’s no need

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1 350 r for 3 plants in a 4x8 ? Sorry just making sure I’ve read that right lol. Yeah mate when I turned upto full on both I noticed some light stress so backed off abit, not sure what % I’mrunning now as there’s no markings. I guess it all comes down to genetics in the end what one plant loves another won’t tolerate.

Blue brother said:

1 350 r for 3 plants in a 4x8 ? Sorry just making sure I’ve read that right lol. Yeah mate when I turned upto full on both I noticed some light stress so backed off abit, not sure what % I’mrunning now as there’s no markings. I guess it all comes down to genetics in the end what one plant loves another won’t tolerate.

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I know this is an old thread, but I just replaced my cmh 315 with the 350r in mid flower, and set to full power at 15”. Immediately got foxtailing. I downloaded the photone app, set it to red/blue setting, and ended up setting the light on the 5th notch to get in the 40/45 DLI range, and approx 1000 ppfd. Has this been your experience?