opinion on these led strips please

thinking about building a 1200w light with these. https://www.arrow.com/en/products/si-b8t341b20ww/samsung-electronics
would like to get your guys opinion if they would work out ok for flowering stage. should i add some red? thanks

4000K is OK for general growing, but for flowering you would probably be better off with 3000K strips – which will also veg fine. Those strips are a few generations old now and use LM561B+ Samsung diodes which are pretty old and not as efficient as the latetst LM301B/H series (there's also a newer H series with higher bins now) and not even as efficient as the old LM561C. If you can find something a bit more modern for around the same price in 2700-3500K you might be better off, but the ones you've posted will still grow plants. You could always buy more strips and run them at lower currents to improve efficiency.

thanks for the reply prawn. yep i have 2 600w meanwell drivers thought i would make a big ol light hehe. ill go half 3k and half 4k. heck at that price if i dont like em ill swap em out..

do you think it would help if i added 4 of these.

thanks again

clay32 said:

thanks for the reply prawn. yep i have 2 600w meanwell drivers thought i would make a big ol light hehe. ill go half 3k and half 4k. heck at that price if i dont like em ill swap em out..

do you think it would help if i added 4 of these.

48 diode 680nm +700nm LED Emerson Effect Quantum Light Strip red booster board | eBay

The 680nm red light and 700nm far red light was shown that when combined provides a yield of photosynthesis that is greater than sum of the two separate wavelengths. This is because there is a cooperative interaction of these two photosystems in photosynthesis.

www.ebay.com

thanks again

Click to expand...

I'll bet that Prawn would prefer these.

clay32 said:

thanks for the reply prawn. yep i have 2 600w meanwell drivers thought i would make a big ol light hehe. ill go half 3k and half 4k. heck at that price if i dont like em ill swap em out..

do you think it would help if i added 4 of these.

48 diode 680nm +700nm LED Emerson Effect Quantum Light Strip red booster board | eBay

The 680nm red light and 700nm far red light was shown that when combined provides a yield of photosynthesis that is greater than sum of the two separate wavelengths. This is because there is a cooperative interaction of these two photosystems in photosynthesis.

www.ebay.com

thanks again

Click to expand...

OK I guess anything is better than nothing but I will point out that those are not Samsung LEDs – they don't make anything like those diodes – and that I seriously doubt those claims about "doubling resin". I've never seen any evidence of that with any light! UV will boost cannabinoids, but usually in the vicinity of 20-30% (max).

So there are two red flags already. I mean, you could always ask the buyer what model Samsung diodes they are and where the evidence for "doubling resin" came from, but be very careful of people who exaggerate claims in the first place.

Those strips are not very powerful, either, at 6W. If they are poor efficiency – and they probably will be – then the overall effect may be minimal.

Obviously I like Buddies (Thanks @1212ham !) because each string of 20 LEDs is 15W and both the 660nm andf 730nm Buddies are right up there in terms of efficiency (the 660 diodes are around 3.8 umol/j and the 730s around 3.4 umol/j, although the diffusers reduce the total output), so I reckon even one string of Buddies would be more powerful than four of those strips at 6W each. But, you also need to consider your budget and shipping etc. All I will say is you usually get what you pay for.

clay32 said:

thanks for the reply prawn. yep i have 2 600w meanwell drivers thought i would make a big ol light hehe. ill go half 3k and half 4k. heck at that price if i dont like em ill swap em out..

do you think it would help if i added 4 of these.

48 diode 680nm +700nm LED Emerson Effect Quantum Light Strip red booster board | eBay

The 680nm red light and 700nm far red light was shown that when combined provides a yield of photosynthesis that is greater than sum of the two separate wavelengths. This is because there is a cooperative interaction of these two photosystems in photosynthesis.

www.ebay.com

thanks again

Click to expand...

what voltage are the drivers? which model specifically?

how big of an area are you gonna cover?

we can help you find a good deal on some better spec strips.

thanks guys.. i have two of these drivers.
voltage is adjustable from 25 to 30
area is 5f by 10f

clay32 said:

thanks guys.. i have two of these drivers.

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voltage is adjustable from 25 to 30
area is 5f by 10f

Click to expand...

tbh that voltage range is a little bit tough to find a match for strips. the M you found seem like the best match /deal on Arrow at the moment. not sure if that's the best price on them tho. when clearance mode kicks in pretty sure those have gone for less.

the original influx linear L04 and L09 2 footers go for pretty cheap. I think those run in the 25+ V range too. they use LM301A diodes so are a little newer, so a little more efficient (and I think 2x diode count of those M strips). when on sale those are pretty cheap too.

you might also be able to get away w running some Vesta Gen 2. 24.8V at 1A, so 18 strips in parallel would give them each @ 1100ma so should work and be close to 25V. they are really nice strips and you get the multi channel option built in. not as cheap but a lot of diodes and 90CRI. only thing is that to get the efficiency up it's nice to only give them 500-700ma. not sure if you will be able to dim them that low and stay in your voltage range. they will take up to 2A each which pushes them to 26+V. but also have to be careful bc too much voltage would fry them.

Also maybe I'm wrong but 25V x 20A is only gonna pull 500W per driver. you would need to find led modules/strips that pull 30V to get that last 100W out of there.

thanks a bunch ilovereggae. that has been real helpfull

if youre at 115V you should be fine drawing "only" 500W form the 600W driver.
about 80% is the sweet spot it seems on 115V, not getting better afterwards.
See page 5 the violet line (115V), EFFICIENCY vs LOAD .

Have a look at the test report for that driver here

The constant current region as tested was 20.7A. We've found that Mean Well drivers can vary a fair bit depending on the batch but they always meet their minimum specs (20A in this case). Some drivers punch well above their minimums while others punch only slighty above. At 25V you should be able to get close to 520W at the strips. @cobshopgrow is correct that efficiency at 80% load at 115V is pretty close to ideal at just over 94%. You could run your LEDs harder and try to draw more voltage (26V or so) to get your wattage higher than 520W but I think it would be hardly worth it. You would be better off running more LEDs at lower currents to give yourself better canopy coverage.