General led discussion

Hey guys,

Don’t see to many discussions about led lighting here. Mostly just what’s better cmh or led, but I’d like to discuss leds, not compare to other lights.

In particular, has anyone personally used far reds and either uva or uvb? If so how was you experience? I’m about to add both to one of my areas for testing, but would love to hear some personal experience.

Also, for any of the diy guys out there, do you think using some eb strips in a vertical orientation would be promising? I’m thinking of taking a couple of strips mounted on aluminum and piecing them together to make a couple of drop down lights to hang in between my plants, I’m wondering if that would increase light penetration enough to make it worth it.

Anyway, thanks as always for your input!

I’ve been building lights since Cree CXAs were top of the line, I’ve found some interesting stuff through testing photomorphology across a few dozen chip series.

Far red (660nm) suck balls and do nothing for flower initiation that isn’t already there from basic power white leds that contain 660 in their output. In fact, all these new enhanced red spectra are getting stomped by my old 4000k 3590s. The whole deal with higher color temperature leds is there is dramatically less loss in the phospor re-emission. The difference between 3000k and 4000k is like 10% radiant efficiency, it’s blowing my mind seeing these new strip lights using predominantly warm samsung and osram mid-powers. I partially attribute this to higher temperatures being unavailable for a while as the midpower platforms were rolling out, at least in the lm305 platform. In cuts that I have run hundreds of times, the resin production and overall biomass under 4000k has consistently out-performed 3000k with 660nm enhancement utilizing identical power inputs.

UVA/B is a trap, especially with leds. UVB will torch your tops if you aren’t only giving them a few seconds a day, and those diodes are absurdly expensive. There hasn’t been much to write home about with UVA, no discernible difference between using it and not.

Side lighting is something you have to be really careful about. It seems to mess with auxin distribution and your stuff can be totally blown out with foxtails if your intensity is too high. Some really low wattage side-lighting can definitely fatten up your lowers, but I would just advocate for more top-down intensity and a very thorough defoliation in the first couple weeks of flower (usually day 21 for me).


Nice! These are the things I’ve been looking for. Tbh, I just got kinda bored with growing, so I wanted to tinker. I do two round of plucking myself, once one day one of flowering, second time around week three as well.

I’ve been super happy with the eb strips so far, the hlg boards are ok, honestly I think the strips are better, but the hlg boards are easier to piece shit together with, less wiring.

And I’m finding out the hard way that whole more red thing is a joke too from my experience with this far red board. But again, I was bored and enjoy building lights lol.

So do you run your lights hard to get more penetration, things still get a little thick for me towards the end of flowering even after the second pluck,or run them softer for more efficiency and keep them closer to the canopy?

Also, I never even considered the auxin distribution, that’s an interesting find.

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does anyone have any experience running the ChilLED logic pucks?

Not with those pucks personally, but I expect they are similar to cobs, just more efficient.

I remember you talking about an led build a little bit ago, I can’t remember, have you messed with them before?

This is one area where I’m somewhat confident in my knowledge.

i’ve been eyeing them up for a while now, haven’t gotten around to pulling the trigger on anything yet as I haven’t figured out the best way to spend 1k+ on lights :rofl:

Lol, yeah, good plan.

How do you grow? How high is your ceiling? Do you keep your canopy even?

If so, you might want to look into something that spreads the light more. I found my cobs didn’t spread the light enough to the edges of my tent.

With strips or boards, the light is nice and even on the whole canopy.