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and that is nichias datasheet

I'm not dogging... I'm just saying that if you are going to grow in an open space, you will always need more diodes vs less more efficient diodes.

This must have been before the evolution to the EVO diodes: They have their absolute maximum rating a 180mA, vs 200mA for Samsung. imo. mid-power is not really suited for commercial type grow-lighting and never really was inteded for it. It works well in grow tents with reflective walls. If...

450 and 660... Usually these diodes have a variance in peak spectrum based on binning.. so you'll hardly get 100% 660nm out of a 660nm diode. But it will be in that ballpark.

I'm not familiar with Nichia, but I heard they are proud of their diodes and the cost reflects it too. They might be better 1-1, but right now you have so many other high efficiency white LED's on the market that you will win with any of them really... Most manufacturers have lm-80 reports...

Yeah, I agree on that.Think about it, HPS was 5% blue. But you'll want between 12-15% blue for veg in a full cycle spectrum. If you're growing strictly short indicas, you could probably go even less blue. If you want a strictly flowering spectrum, I'd shoot for 6-10% blue.

If you want top diodes, you'll have to pay for them... The 301B's aren't much better than a lot of the other diodes on the market tbh... There was a change in performance with those diodes after they upgraded the casing to EVO lines. They were very quiet about this but I think there were some...

Well yeah generally, the royal blue and deep red diodes today put those bulb diodes to shame... Plus you can shades of blue and shades of red today, and even a cunthair or white in there to just to even it out...green is getting better too. The only argument for using green (at least the way I...

Or I meant the quality and range of the monos in comparison to the monos used back then...

Phillips

You're right, and the blurple today isn't what it used to be, it's much better. Wider spectrum choices in both red and blue, along with white to serve as green.

White and red is all you need. You can get fancy with UV,FR,Green,Blue whatever... But I doubt you're really going to notice that much of a difference other than maybe better terpenes and plant shape. CO2 and intensity are more important than all the mumbo jumbo.

I heard through a guy (in the LED industry) that the true increase in efficiency would only be around 5% for the 3737's. But 5% is still the bump we've been anticipating over previous generation 3030's. There 3535's that are quite good too.

I'm missing a light with a switch, more blue in veg, more red in flower. But generally, the only reason you'd be getting better results with one brand over the other is spectrum. You're better off getting a light that is geared towards RGB ratios, with higher concentration of red in the...

Yeah, Osram is quite good on price for what you get. Always have been.

Not sure why they have 2 far reds GF 1 and 2? I don't think the 640 is released yet. The 3737 were advertised many months ago, but they were not available until recently. The white one is pretty impressive too at almost 10x PPF a lm301 from Sammy.

Well yeah, that's true to an extent, and you can get quite high red from 3000k diodes, but the more phosphorous you put in them, the less efficient they become. The added 660nm red also peaks higher than the red in whites quite considerably.

I could almost see this coming... White light is no longer most efficient in the 301 package from Samsung, and they never did make red, or blue in a 3030 package. I do like their 437nm contribution, although their own tests show better flavinols coming from a non-437nm diode. If they would...

So, Osram recently released a new 3737 Red diode which is 11% more efficient than previous generation. Another thing worth mentioning is that the peak wavelengths are shifted from 646nm-666nm from previous generation to 665nm-680nm. So more towards the 700nm mark. I'm not sure the difference...