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Quantum boards use the same phosphor tech that's used on COBs or any other white LED. Spectrum is pretty much the same. Only difference is that a Samsung LM561C has 1 die per LED, while COBs have multiple die in a single package. Since heat/light sources are spread around with a quantum board...

Around 70PPF per 1212 at 1.05A.

It's pretty perfect for 30x30 PPF values really depend on a lot of factors, if it's inside a box with reflective walls PPF is going to be pretty similar to PPF values closer than 30cm.

Or you get generic LED bulbs (at least 100lm/w) preferably 100w equivalents. (13-15W) remove the bulb/diffuser part and use that. Actually more efficient than the Viparspectra. But the vipar should beat CFL too, easily.

That screw seems a little too big. And what the hell have you done :lol:

http://www.cree.com/news-media/news/article/cree-launches-the-industrys-brightest-and-most-efficient-royal-blue-led DURHAM, N.C. -- Cree, Inc. (Nasdaq: CREE) announces the new XLamp® XP-G3 Royal Blue LED, the industry’s highest performing Royal Blue LED. The new XP-G3 LED doubles the maximum...

And again I have to tell you that the luminous efficacy isn't just a product of the efficiency of a lightsource it's also a product of how well it's detected by the human eye. And again, answer this question. Are you arguing that a hypothetical UV-C led that produces 200mw UV-C at 1W is 0%...

I am the hopeless case? Also I've asked this a few times already, if an UV-C led puts out 200mw light while pulling 1W. Are you going to argue it's 0% efficient because its luminous efficacy is 0? Why do you constantly ignore most points and only respond with personal insults? Also why would...

And again with that flawed way to measure the heat. You don't think it's a little flawed if your test always come out between 75-80% when the difference of efficiency between chips is much greater? Also LEDs have been sphere tested, which is going to be much more accurate and yet your findings...

Sounds like your landlord is ripping you off with warm water prices. May as well just install an electric heater for water in that case. Or you're lying.

There's also the 1750K Gen. 7 Décor Food Meat & Deli Vero 29 if you really like the red.

Using warm white COBs? https://www.cutter.com.au/proddetail.php?prod=cut2812 This should be the DD bin. Hard to find with RIU distributors because high kelvin COBs aren't very popular. 3000/3500/4000 are by far the most popular.

High CRI (2700-3500K) lights just tend to have more red (than similar Kelvin and 80 cri lights) and a peak close to 630nm. That's why they're often preferred. In the end it doesn't really matter that much. Plants look nicer in high CRI light though, if you like to look at them. Also easier to...

Even when underdriven and water cooled the Epistars get destroyed in efficiency unless you cherry pick bins. Besides water cooling will only cool the COB at most a few degrees more than a proper air cooler. mahiulana claims the Epistar produces 138.2 lm/w at 721mA...

You are ignoring facts. Facts that the royal blue produces up to 575mw radiant flux while driven at 0.35A (1W) Tell me, how can your system be 2-3 times more efficient when the Cree is already up tp at least 57%. Are you going to claim you can get 1.5W out of 1W? Also you are posting plain...

You are providing exactly zero counter arguments. Also, should I ask the question you've been dodging again? If an 1W UV-C led produces 200mw UV-C, are you going to argue it's 0% efficient because its luminous efficacy is exactly 0lm/w? Anyway, the comparison you had made with the 5000/5700k...

Or maybe the blue tubes had a good deal of UV.

Organic is just a buzz word devoid of much meaning.

200 lpw at 35w sounds like a 70cri 5000k dd bin.

Honestly I don't even need to see any growlogs of whatever new chip/led comes out provided the spectrum is given and close enough to identical colour temps. I think you can safely trust the datasheets of lumiled/citiled/bridgelux/etc. Ultimately those chips are all doing the same thing. Some...