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No, LED produces about 80% less heat watt for watt than HPS, its more efficient at producing light than traditional bulbs (thats why things are switching to LED). But you have issues with this in say street lights that will now frost/freeze/ice over because the LED produces so little heat...

This is a rather funny argument to pop up in an LED thread, but it does bring up something people often over look. LED does produce so little heat compared to HID that you may have issues with low temps using LED. I feel its accurate people say LED puts out about 80% less heat per watt than...

I've read over 7 completed grow journals between 4-5 people here and (mostly) on 420mag.com grown with growledhydro Spectra LED lights (If I remember correctly all the grows harvested between Jan 1st 2010 and up to a couple weeks ago). They all looked great, nobody had any issues with customer...

I think if there is really much difference in how long they take that it would maybe be that they fill out sooner but take a little longer to finish? It probably only takes longer if you have a crappy LED light (or one that while top of the line for its time, is quite out of date)

Well its hard to tell if its made of quality bits or not, they don't tell you the watt rating of the LEDs or the lens angle, all that jazz. These lights can work because they can be made up of the same stuff the proven panels are, but it seems hard to find any that come with enough details to be...

so this was all just about LST? or is it a pinch/cut then LST?

Do you feel you are going to start working only with 500s or many of the smaller GLH units?

There is no way to establish this, most panels are crap, and most of the people that buy them are newer growers. People also do their math wrong because they haven't calculated the accurate wattage of their light, and overestimate how good the lights are. Basically you can get yourself LED that...

Check out the Irishboy grows on this site for starters, there were a ton over on 420 mag.com but I think they got banned/shutdown for talking about their bad experience with certain sponsors). I've definitely read at least 7 completed grows between 4 or 5 growers done with GLH Spectra LED panels...

If I understand the situation correctly most GLH orders can be expected to take up to 2 weeks before shipping out to you, this is because they get many orders and have to wait for stuff to be shipped in. For whatever reason they decide to communicate this to people by saying they have a bunch in...

I'm also pretty sure nobody runs 3w LEDs at more than 1.75w which is the highest I've ever heard of (and I don't even know if it was true at the time), my 395w panel is 252 3w LEDs and the whole thing including the 6 fans is supposed to run 395w with each LED running 1.5w

I'm going by the link I was looking at, figured it was the same ones he was talking about, nothing about 3w diodes anywhere on there is all I'm saying

Yeah really its probably too much N slowing em down, maybe the mykos doing something, and me underestimating the power of the light Hey when you gonna star the GLH/Spectra Fan club? :P Great looking new plants, they always look so nice with the green and purple in your pics! Gonna use any new...

I do have them in a pretty crazy batch of stuff in them air pots, but I would think the inter nodes all growing at once and so close together that it was the light being too intense/too close and not anything that could have been done with all organic stuff. Really I think the light must have...

Ok these look to be built very similarly to growledhydro lights except at least these guys still use 2w LEDs where as GLH uses 3w. These guys should be a pretty safe bet, but I see no reason to go with them over GLH when GLH is better for at least using 3w LED (there may be other features GLH...

Irish have you grown any seedlings under these LED? I'm kinda frustrated with myself now for not keeping mine under CFL first, the LED made the inter nodes so close together the little plants have barely grown in over all size after 3 weeks from growing every possible point at once (that was at...

I'll say I was quite pleased with how big my .8 gallon air pot plants got with only a month of veg before 12/12, I think its the perfect size for a SOG of 2 ft plants. If I had 9 of em I would go that in my 2.5ft x 2.5ft x 6ft tent with my 395w LED

Well I know GLH said their diodes sit directly on heat sink and not PCB then heat sink. Pretty sure another company does this, sent GLH an email asking for further clarification. In comments on pics of the heat sink of a GLH panel some people said there were more breakers than normal or...

The Chinese can make great shit, its usually the buyer that wants to cut corners in manufacturing, you can get amazing LED panels with all the great features from factories in China, you just have to know the right one to talk to and know what you want. But since most us won't every spend more...

Well 144 3w LEDs should run about 216-252w total, which is 1.5 - 1.75w per 3w diode (they don't run higher for good reasons). That doesn't count fans, which I imagine should run about 2-4w each, and most good panels have 6 I'm pretty sure 3w diodes are not able to run higher that 1.75w mostly...