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That is impressive on that setup. My room dimensions are about the same. You took DIY to the next level.

I get what you're saying, don't think I'm misunderstanding the concept. The purpose of a heat sink is to offset the amount of heat that an LED is putting out by transferring the heat to the heat sink. Yes? The more efficient the heat sink, the lower the ambient temp will be in the tent/room...

I probably would use HLG if my space allowed. The heat and vertical restriction is the only problem for me . Plus I'm doing mine in large hydro reservoirs so the heat makes the humidity that much worse with transpiration. I saw the 650r-spec in action the other day and I think I can confidently...

In my experience, I've not seen anyone placing high output LEDs close to the canopy. Maybe some lower power ones. Some of my flowers have been 15" below the light with hps and never had problems because they are cooled. Sometimes closer. That's been unintentional due to limited headspace and...

Hi Dr. Thanks for all your information! Running dwc. I use silica 1 ml/gal through veg or 2 to 3 ml/gal on heavy training before the flip. I cut it about 2 or 3 weeks in flower. When you say don't use silica with this, are you meaning in the same feeding regimen or don't add silica directly to this?

What are your temps and humidity like outside the tent?

I would like to add that heat is not a big issue with air cooled HID lamps, thus will not put out the same amount of heat as an LED. I'm not arguing that 600 watts of HPS power runs cooler than 600 watts of LED power. However, if they are closed hoods, ducted and being cooled by an external fan...

Thanks for the input. This gives me a better idea on the roi. The tops of my sites are exactly 5' from my ceiling and I do large plants horizontally. So at best I would have them pushed down to 30" tall - leaving me with 30", minus the vertical space of the light to play with. So those would...

Thanks! I will look these over before asking a bunch of questions.

Ah yes. I forgot about the waterfall type. Those can be ran without so much negative pressure. My system is built for 2 large sites where it tees from the 2" to half in between the sites, through the pump, and back into reservoir. It's 60 gal at capacity so recirculates right at 10 times an hr...

Growers Choice was the other I was looking at. 3 lbs a light seems like a very ambitious claim for them to make. Even with C02, only so much bud can optimally grow per s/f. I would be happy with 1.5 at a 680w draw. Any more is a gift. When you say height, are you meaning they put off a lot of...

Nice ones! NL5xhaze was another that I had picked a mom for but didn't get the chance to flower. It grew very similar to the NL5 I was actually able finish to flower from Female Seeds. That was one of the few variants that had a few "weeding out". It definitely benefits from a long cure. The...

I also do larger plants but in hydro. That is a nice branch there. I never did a lot of sativa dominant but ran destroyer which is 100 sativa A lot of people I see are only vegging with LEDs. All things optimal, I still think HPS gives the biggest harvest/quality per SF. But I'm anxious to see...

That last statement is actually a good idea about air cooling quantum boards. Hell of a lot more efficient than computer fans just moving the heat into the space. I'm still rocking a portable AC and live in an overall warmer climate, so try to keep my flower outside the scope of the hottest...

Understand. I think I'm just spoiled from running air cooled hoods. I ran 2 ducted 1000w digilux at full blast with a hyper fan at no more than 60% power and could put my hand on the bottom of the glass or anywhere on the fixture, as it was only warm. I guess my quandry with LEDs is they don't...

Roger that.

Nice, do you have any threads or photos with results? Gavita was actually at the top of my list along with Amare and Growlogic. Just trying to narrow it down. My space is a sealed built 6x13 area with only 74" of vertical space. A cockroach could fart and it would probably blow the walls off...

Thank you for that. I'm completely new to LEDs. Lucky for me, my local shop has HLGs running their perpetual grow, along with a few others, and I'm pretty sure I could cook over easy eggs with those things running at 100. This is not meant a shot at people that use them. I know they give good...

It really depends. Any breeder that's been around awhile will have good genetics. DNA, Barney's Farm, DJ Short etc.. Then you will have some that pay an especially great attention to detail when crossing and back crossing in order to bring out dominant traits that several strains are known for...