There are a few different theories on this. A lot of guys are running UVA and UVB for a few hours to simulate peak UV times during the day. For Emerson effect, they are running far red (730m) towards the end of the cycle to simulate dusk. Both of these require separate channels to drive at different...

Yeah, that's right - that's why there have been concerns over the amount of UVB given off by twisty CFLs vs tubes and other lighting. In fact, LED companies tout the lack if UV as being an advantage for their indoor product over fluoros.

LEDs convert more energy to light and less energy to heat compared to HIDs. LEDs can be placed closer to the canopy, maximising their efficiency. LEDs have a fuller spectrum of light than most HIDs (CMH being the best HID), providing more efficient photosynthesis. LEDs focus all their light down, sp...

what would you say is the ideal canopy dimension for those panels? assume less heat is allowing you to keep them closer to the plants than HID allows are you seeing even better results the simple watts to lumen increase over bulbs? These are designed to be a direct 600W HPS replacement, so two LED ...

Thanks Prawn, My old growing area in the attic between joists is 4' x 8' perfect for this size. Ahh i forgot abut the low UV thing with leds. tho i think leds can be engineered to produce a wide range of frequencies, but don't know if there are any out there with sufficient UV for our plants. if so...

I'm not really saying "Buy my LEDS", BTW - that was just a joke about SPAM

There might be some boards floating around for anyone interested, though

Nice "spam". but is there a link for buying? Yer using a vertical CFL also (can't quite give that up eh). how much do you think that's adding to the LED light production? or just difference in growth? Wow the specs look awesome, maybe l left indoor growing just too early for the fun stuff...

NICE! how much in US $ ? :toker1: Not too sure yet. I guess it depends how many we make and if anyone else's interested. We're making a limited number first, mainly as they're what we wanted for ourselves. It's really a LED panel made for growers, by growers. They'll be mostly DIY panels and kits, ...

A few more. I love these things.

Here are some of the LED experimental grows:

Here's an MPG first - it' a new LED panel design that will directly replace a 600W HPS with 400W of high-red, high colour index, full spectrum (UV to Far Red) LED light that also knocks a week or so off flowering times. Someone I know has been working on this design for some time now. :winky: It's a...

Can you bastards please STOP removing all the spam posts?!? Now I don't know what the fuck this thread is all about and I can even take the piss!

Far out! Crowding? A little stretch isn't an issue if you've got room, but obviously the more energy that goes into building stem cells, the less goes into leaves and shoots. That might be part of the reason for slightly slower growth. I also like giving my seedlings a decent pot to let their roots ...

Ooh, little bit stretchy. Have you got it under lights or on the window sill or outside or something?

^^^ saw a dog sit and shiver for hours after getting at some butter a friend had made... ...and remember humanity is relative. aint it the truth! https://www.youtube.com/watch?v=eOAMe5BQypM Yeah, I was a little bit concerned at first. I'd just strained the butter and left the cheesecloth on the cou...