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High Times had an article in late 90's.. guys in Holland were experimenting with 24/12. All the energy is acquired and stored throughout the day (24hr period), then converted to sugars and whatever else during the night period (12hrs). Their theory was.. with the longer day period, and since...

Are you talking Sensa-Spray? Good stuff.. I swear by it.. all female, and about 50% more yield. .. But you don't want to spray seedlings with it. What you'd use in "this" situation, is "Sensa-Soak".. for germinating. Now, for all I know.. it "could" be the exact same stuff.. just a...

I've done wick before.. best if vermiculite/perlite mixture.. you can alter the moisture retension by adding more or less perlte.. the white stuff. Vermiculite expands and retains, while perlite allows a bit of aeration. Also.. don't forget the air stone and air pump. And whatever you use for...

"Down to Earth??" Did you not google IrishBoy like I suggested? You'd find 480w and 720w grow, 600w grow, and his latest 1,000w grow. http://www.thcfarmer.com/forums/f6/irish-boys-480w-720w-grow-led-hydro-land-clovers-28169/...

By the way... a good source for 660nm's... Osram HyperRed's at "rapidled"... $6 a pop, and mounted on stars. Everyone else selling Osram's aren't mounting on stars.. not as easy to work with. http://www.rapidled.com/servlet/the-172/Osram-660nm-3W-Red/Detail

You've obviously been looking at the wrong posts... google "IrishBoy led" on the forums.. very impressive, and that's just "1".. plenty more. Problem is.. most who buy a panel are thinking.. "Shit yeah.. I'm a grower!" But question is.. how much experience growing with hid's? LED's are a...

Not sure if it's just the light, but they look kinda yellow. As for Hortilux... 1000W HPS: vs Cree XP-G LEDs And as for the 1,000w.. don't forget the 15% overhead that the ballast uses.. actual draw is about 1,150w. ;) You've more than likely heard of...

https://www.rollitup.org/do-yourself/420515-diy-carbon-filter-easy-cheap.html https://www.rollitup.org/indoor-growing/7074-easy-build-diy-carbon-filter.html http://forums.mycotopia.net/cannabis/8038-diy-carbon-scrubber.html There's an industrial supply warehouse near where I live, so I...

It's the Cree Whites that boost the Lumens so much... more than 100 Lumens per led. And if you look at the face of the panel.. there's only 1 white in the whole thing. This is the company that was boasting "Cree" in their panels.. but it's not "all" Cree's in there.. Cree doesn't make 660nm for...

That is a pretty good point. Since led's only raise the temp by so little, many 1st timers think they don't need to vent the space... thus not replenishing the co2. Plants won't grow as well without proper air exchange. If adding co2 to the garden, then yes.. keep sealed, and let the temp rise...

Thanks man. :) 465nm 612nm 660nm But it's missing 450nm, 630nm, and InfraRed 730nm. Although InfraRed's not in the graph, it's been found that plants do need it. Not a lot, but some. Spectrums I'm using... 410-415nm 450nm 470nm 610-620nm 630nm 660nm 735nm...

Just a quick note on fans... The fans aren't so much for "venting" as they are for keeping the heatsink cool. The led's are heat sensitive. They are tested for 25c.. anything above, and the led's lifespan shorten very quickly. And if too high... dead led. It's not the heatsink itself that...

You're forgetting that a fan, even in the hottest of summers, will make you feel cooler if blowing directly on you. As for the cpu and tower.. speaking from experience. Have a thermalright highriser.. fan blowing in had lower temps than fan drawing through. Even better in a push-pull though :D...

Actually.. it's 450nm blues, and below, that aren't measured in Lumens.. they're measured in mW.. energy, not luminosity. Same as the InfraRed 735nm's. As for 50,000 Lumen hps compared to 10,000 Lumen led.. yes, I already said "at least 50% of the hps Lumens are wasted".

Yep.. blowing in/down on the heatsink is best, even if just a cheap aluminum panel with "no" fins. Otherwise, there's no guarantee the cool air will be flowing across the panel.. it could be pulled directly from the side intake vents, and output from the fans.. but never actually hit the fins...

Here's something else to consider... blues usually have about 50% of the Lumens that reds have, so if a manufacturer uses an 8:1 ratio of red to blues, but the blues are only 1/2 the lumen rating as the reds.. and the manufacturer did his ratio by # of stars, not actual red Lumens to blue...

Naw.. show the failure's.. it's what learning's all about man. Shows what you started with, what you experienced in success and failure, and what you did to overcome the failures. ;) Honesty's always my policy.. if I f* up, well.. I'm only human, right? :D And theres always someone else...

This is the way I understand it... in series, all led's in string share same current, but voltage is added for each. In parallel, all led's share same voltage, but current is added for each. If say led's use 2.1v @ 350mA, and you have a 24vdc source @ 5 Amps. You can wire 11 led's in series...

Yes.. but you got yours for free, right? :D Still, $400 is "average".. better than the "SG 1250HO" Apply 15% to 580w... a 500w panel (575w + 5w for fans)... for ONLY $3500!! $3500??!!?? For a 500w panel??!!?? LOL!!!

I did figure then in. 150w * 0.15 = 172.5w.. leaving 7.5w for 4 (6?) fans.