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So the 90cri side has 7% less par. It will be interesting to watch the 2 sides progress.

Looking good:) I'm just curious what ppfd you're running at atm, and if you've measured how much power each side consumes I've been wondering all along if the 90cri side gets an unfair advantage by setting both sides using par. Since the 90 cri outputs more photons in a nm range that the...

I hope it works out well, but I think its going to run pretty hot. It looks like a lot of hot air will be trapped inside the case. It'll eventually spill out, but I bet everything will be 10-15 degrees c warmer than it would be in open air. The pin fin sinks will only be cooling from the...

I've got a couple of these on order, didn't notice the voltage problem - thankfully I'm running CV drivers... I guess this is just 1 more advantage they have over the CC. Nice to know that the meters won't immediately blow up when measuring >100v, definitely wouldn't leave it hooked up for any...

Next we'll be arguing that the sun doesn't "rise" or "set" :)

As seen in this semi-famous thread: A perfect cure every time IMO required reading for new growers (and probably some experienced ones as well)

That is a nice looking canopy (and some people still wonder if Citizen can grow the dank)

The discoloration is from the deficiencies . The growth is what I would expect from a powerful, full-spectrum light. Plants will grow differently depending on the light source. If light levels are on the low side they will often grow fatter leaves to catch more light. With a more powerful...

That last 2 pics show clear signs of deficiencies. Calcium I think (maybe more), tho it would help if it was in higher resolution. Maybe the feed isn't strong enough, maybe they're just not transpiring enough (calcium can only be uptaken by them drinking). There are a lot of reasons that...

I'm afraid that this comment shows a lack of understanding of series wiring vs parallel wiring. You use a constant current driver, which means that the cobs are hooked in series and the full 343v flows through that string of cobs, and each cob takes what it needs. This means that the voltage...

IMO if you're looking to lower currents in the future you're much better off using Constant Voltage drivers instead of Constant Current. How hard they run the cobs depends on how many cobs are hooked up per driver. So when you have more funds you buy more cobs and hook them to the same driver...

Your plants usually spend much more time in flower than in veg and the time spent there is much more crucial. 3000K is perfect for flowering and has more than enough blue for veg as well. 80 or 90 cri is a decision you will have to make. There are several threads devoted to testing out which...

Anyway I'm done arguing for awhile :) Arguing with people on the internet is like a couple of monkeys throwing their feces at each other. When its over both have their fist held high in triumph. But in reality they're just 2 monkeys covered in shit.

This is a lie. Please stop. BOBBY_G was not allowed to use his personal acct after he became a vendor. This was a staff decision. I have nothing personal against you. I just don't like it when you confuse new users with half-truths and opinion, and attack the integrity of RIU vendors...

These are from Cobkits. the x is ppfd/w, the y is wattage. Its great because it shows how different manufacturers do better at different levels. If you are going to run very softly, your choice may be different than if you're going to run them harder. You will find these graphs in many...

First you say this Then you say this... You never say " look at my data" or "look at my testing" or "look at someone else's testing" You just say "here's what I believe, and my opinion is better than anyone else's opinion or testing or data, or anything else" I would trust people who supply...

Yeah he doesn't like cobs, so when anyone new asks what it costs to build a fixture he likes to quote prices that are 2-3 times what is necessary. 12 cxm22 at 50w each will give you 600w per 4x4, which is more than enough. Plenty of people are building fixtures and paying $1 watt or less...

Also if anyone is going to go buy a couple or thee bulbs to put their seedlings/clones under, don't buy cfls, buy some led bulbs and pop the diffusers off. They work great, actually send the light where you want it to go, are more efficient, and last for many years.

If what you're after is a larger hot spot in the center, then yes, absolutely.

Any spectrum graph I've ever seen for white leds drops off to 0 at around 410nm