New 2 LED growing, adding 2 leds to sealed room setup.

First off I'll fill you in about my friends setup.

Perpetual sealed room

Lung room: comp controlled, CO2 gen, mini split ac, dehu, fans to other rooms, sensor in flower

small veg room with 600w MH and adjust-a-wing hood(bare-bulb), and a T-5 setup for seeds

Flower has space for 4 setups to run, currently running 3 600w HPS with adjust-a-wing hoods(bare-bulb)

co2=1200 ppm in daytime, temps 85 in day 75 night, 38%rh.

Going to swap out 1 of the current HPS for an LED and add one more LED to make 4 light setups in flower. Goal is to get temps to 82 in daytime 72 night, and reduce ac usage in the process.

Here is the LED he will going to use. I know its Chinese but he feels like a little documentation of success or failure with these may be helpful to others.
http://www.ebay.com/itm/141394738493?_trksid=p2059210.m2749.l2649&ssPageName=STRK:MEBIDX:IT

Plan is for the plants to spend the first half of flower time under LEDs and then get moved over to the HPS side of the room when an hps light gets harvested. Let me know if you have any questions, comments, suggestions, or concerns. Thank you! write-up on the room in the future with pics

If you/he are investing that much in a proper environment you should do LEDs justice and make YOUR time worth the trial and invest in quality. That panel may only draw <400w and not beat out a 400hps. You will be disappointed. Look into Area 51 or Apache Tech, the latter is definitely an investment but the best prebuilt representation of the tech and WILL outproduce their equivalent HPS options, in yield and quality.

Well the actual power draw is like 350 watts, which should beat out a 400w hps due to LED efficiency. Now I know that 350w of LED is certainly NOT going to beat the 2 600w HPS being ran in this room. With that being said, the theory is that the cheap LED setups will provide similar growth during the first 5 weeks of flower(assuming 10 week strain), and switching them to the 600w HPS for last 5 weeks of flower to finish up with that HID intensity and penetration. Not as much penetration or intensity is needed until mid-late flower when the plants are at their biggest and the buds are starting to become more than a bunch of hairs. Any opinions on this?

And It should be noted that this is mostly an experiment. If these LEDs don't do what is needed they will be upgraded down the line. The purpose is to actually give these cheaper lights a test in a scenario to see if it would be realistic to save the grower come cash. It doesn't mean you wont need some good bulbs at some points. A MH bulb in veg is just hard to beat, and hps intensity and penetration in late flower is key to density, but it seems plausible that in early-mid flower its less important to yield and quality.

My friend will also be posting a write-up with pictures of his medical grow soon. His name on here is GreenSnake

You should take into account the actual dissipated/technical efficiency of the individual LEDs CAN be less than an HID bulb. Depends on how cheap/low end they are.

tanman1990 said:

Well the actual power draw is like 350 watts, which should beat out a 400w hps due to LED efficiency. Now I know that 350w of LED is certainly NOT going to beat the 2 600w HPS being ran in this room. With that being said, the theory is that the cheap LED setups will provide similar growth during the first 5 weeks of flower(assuming 10 week strain), and switching them to the 600w HPS for last 5 weeks of flower to finish up with that HID intensity and penetration. Not as much penetration or intensity is needed until mid-late flower when the plants are at their biggest and the buds are starting to become more than a bunch of hairs. Any opinions on this?

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I think this would highly depend on what type of LED you use, if you use a cheap Chinese panel with low quality parts you might not beat out a 400w HPS, efficiency is all great on paper but it doesn't always translate directly unless you use quality LED parts not junk from china.

tanman1990 said:

Well the actual power draw is like 350 watts, which should beat out a 400w hps due to LED efficiency. Now I know that 350w of LED is certainly NOT going to beat the 2 600w HPS being ran in this room. With that being said, the theory is that the cheap LED setups will provide similar growth during the first 5 weeks of flower(assuming 10 week strain), and switching them to the 600w HPS for last 5 weeks of flower to finish up with that HID intensity and penetration. Not as much penetration or intensity is needed until mid-late flower when the plants are at their biggest and the buds are starting to become more than a bunch of hairs. Any opinions on this?

Click to expand...

this light is a full spectrum, u can use it both one veg and flower period, it can help u to improve output, i know someone use this light and have a very good result.

recently there have many fake information and products in website, so for security i suggest u to review this website http://www.topledgrowlight.com/ . in there u will find the lights are good quality with reasonable price.

Just go with a cxa3070 build. Unbeatable results.

tanman1990 said:

...and hps intensity and penetration in late flower is key to density...

Click to expand...

This brings up the question of how is intensity and penetration even measured...
Intensity is easy...get a meter(preferably a PAR meter) and get a reading...that is the intensity at the canopy.
Penetration is actually pretty easy too, just one more variable...It's the intensity combined with the distance from the source...
1)1000µmols@24". Less intense at the canopy, more penetration power. If normalized to a 12" reading would be ~4000µmols@12"
2)2000mols@12" More intense at the canopy...less penetration power. If normalized to a 24" reading would only be ~500µmols@24".

If we really want to get technical then you would some how have to take into account the different absorption and transmittance of each nm...but basic inverse square laws should be enough for a valid comparison.

There are LED's that have better penetration and intensity than a 1K hps....and cover the same area as the hps

Exactly what greengenes said. You can get a 50watt led that has garbage spectrum and no intensity., but still look bright to the eye. This is where high end name brand leds come into play. Imo anything worth doing is worth doing right... why take a chance with a g arbage light?