Help me plan my 2nd LED grow!!! Pleaseee $1200

[CaliCaretaker]

okay so im about to start my second grow, money is not a problem i wont to get this grow right!
i can't start it until after July 4th and won't start it until i have the perfect stealth LED grow. by stealth i basically mean a lightproof/soundproof cab.

i have ordered the following beans:
5 Fem. Greenhouse Seeds Super Lemon Haze
8 Fem. G13 White Widow
1 Fem. G13 Og13
1 Fem. World of Seeds Legend, Mazar Kush
1 Fem. Barneys Farm, Critical Kush'


and I have the following:
1 Fem. LowRyder 2
1 Humboldt fem.
2 Bagseeds(blueberry haze)
Mylar
a bunch of decent sized pots.

I need everything; nutes, soil, buckets(possibly 5 gAllON?), fans, carbon filter, grow space(think stealth), and lights.


I have four 44 CFM silent computer fans from my last grow..

leaning towards two 240w Blackstar units, plus some CFL's(i already have the cfl's)

i want to harvest anywhere from 2-4 oz. anymore i would not know what to do with myself, i currently havent medicated in over a month and won't until after i grow, maybe. lol

i was thinking i'd start the LowRyder 2 under a few CFL's and about 3 weeks in add a 240w Blackstar and one of my photoperiod strain, thinking the white widow since it's a short flowering period. When the LowRyder 2 is finishing up I will start vegging a Super Lemon Haze in my CFL cab, add the 2nd 240w blackstar for side lighting(in the flowering cab), and turn the LEDs to flowering the G13 White Widow and add the SLH when ready..

any input/suggestions are welcome.
this website has the best LED section i've seen so far..

 

[thatsmessedup]

You are going to run into trouble with heat running 2 bs 240s and cfls if all you have is computer fans. If you are going stealth you no doubt want it silent. But stelth means no smell and more then likely a carbon filter. I have ran the equivalent to 2 240 and cfls and my 2.5'x2.5' tent needed a 6" turbine 430cfm fan to keep temps just 8 degrees hotter then room temps while hooked to a filter. So if my room was 75 the tent would be around 83. I have no doubt you can meet your goals of 2 - 4 ounces with just the leds, so my suggestion is just do straight led. Your temps will be more manageable (about 6 degrees above room temp), less heat, less fans, less noise. Leds do put out some sound from their fans as well, so you will need a cab that has sound insulation. Good Luck!

 

[TubeAndJar]

Yeah, forget the CFLs, for what you want to accomplish the 2x240s will be fine.

Give us more info on how stealth u need. Do you need a cab that can go in a closet, or a cab that can sit out in the open in your bedroom or something? Is smell a concern?

 

[CaliCaretaker]

i want it to sit out in my room and yes smell is a concern, i have decided to only purchase 1 240w blackstar. the dimensions of my cab are about 46"W x 18.5"D x 70"H.

 

[PetFlora]

Here's a cool place to by solderless LED kits, using best tech & leds. www.RapidLED.com It is going to seem like it's aquarium only but those in the know now know that Neutral White & Warm White are much better than R/B alone, and that aside from some 380-420 Blue and some 660-740 Red the combination of which is only needed during flower you can get best tech for a relatively small amount of money. I haven't pulled the trigger yet, but plan to

 

[patrikantonius]

It is going to seem like it's aquarium only but those in the know now know that Neutral Waite & Warm White are much better than R/B alone

What is it that makes you say that ? I would be pleased to read scientific studies or just examples that prove that.

 

[PetFlora]

^^^
There are so many studies, it makes me wonder why the early led mfgs ignored it. DIYers have known this for quite some time.

It is only recently that mfgs are beginning to see the light- and it's WHITE

Google 'the importance of green spectrum' or search on RIU

Also look at SDGs of metal halide & hps. You will soon see what is missing from R/B leds

 

[patrikantonius]

I've found two studies, one which is analyzing tomato transplants and the other one, lettuce.

The results show that adding green spectrum actually improves the grow of lettuce but for tomato plants, it is the opposite, it decreases their growth compared to only red & blue spectrum. It is therefore not as obvious as you stated; what would be really useful for us is a comparison on mj plants or figuring out whether mj is biologically closer to lettuce or to tomato plants.

http://www.lzi.lt/tomai/97(2)tomas/97_2_tomas_str10.pdf
http://hortsci.ashspublications.org/content/39/7/1617.full.pdf

If you have any further material on this subject, I would be very happy to discuss it. Anyway, I've created a thread for DIY LED grow light discussion : https://www.rollitup.org/led-other-lighting/530144-self-made-led-panel-general.html#post7472041 , you're obviously welcome to contribute.

 

[PetFlora]

Delete. Double post

 

[PetFlora]

This is from a website called SkunkSkool. This should provide sufficient 'proof'

Just over 50% of green light is reflected. The rest is used by the plant to aid in photosynthesis.


Positive Effects of Green Light on Cannabis Photosynthesis

It has been discovered that plants do respond to green light, particularly during vegetation.

During the pre vegetation stage (before seed casing pops off) green light will negate all the negative effects of blue and red irradiation. With stems maturing quicker and stronger.

Indeed if green light is used throughout the entire vegetation cycle your plants will mature quicker and be much stronger than had you used red and blue on their own.


This may be a little 'out there' but it has also been surmised that cannabis could adapt and grow in a pure green spectrum environment.

food for thought


(I highlighted the last sentences of each paragraph):

During the transition from darkness to light, the rate of hypocotyl elongation is determined from the integration of light signals sensed through the phototropin, cryptochrome, and phytochrome signalling pathways. In all light conditions studied, from UV to far-red, early hypocotyl growth is rapidly and robustly suppressed within minutes of illumination in a manner dependent upon light quality and quantity. In this study, it is shown that green light (GL) irradiation leads to a rapid increase in the growth rate of etiolated Arabidopsis seedlings. GL-mediated growth promotion was detected in response to constant irradiation or a short, single pulse of light with a similar time course. The response has a threshold between 10?1 and 100 ?mol m?2, is saturated before 102 ?mol m?2 and obeys reciprocity. Genetic analyses indicate that the cryptochrome or phototropin photoreceptors do not participate in the response. The major phytochrome receptors influence the normal amplitude and timing of the GL response, yet the GL response is normal in seedlings grown for hours under constant dim-red light. Therefore, phytochrome activation enhances, but is not required for, the GL response. Seedlings grown under green, red, and blue light together are longer than those grown under red and blue alone. These data indicate that a novel GL-activated light sensor promotes early stem elongation that antagonizes growth inhibition. [/B]

Monochromatic green light (GL) has been shown to act as a signal in regulating specific facets of plant physiology, inhibiting seedling mass, plant cell culture growth, and light-induced gravitropic root elongating. Recently it has been shown that GL can reverse blue light-induced stomatal opening. The GL response is mediated through a yet-to-be-defined photosensor, and genetic analyses suggest the response to be zeaxanthin based. Plant responses to GL may be initiated through known light sensors. Phytochromes and cryptochromes absorb GL and possibly influence light-induced events. However, the action/response spectra for GL-induced responses exhibit a peak between 540 to 550 nm and thus are incongruous with the absorption spectra for phytochromes, cryptochromes, and phototropins and the action spectra for the responses they govern. GL signals may also be a consequence of low-level coactivation of multiple sensory systems that together guide atypical physiological outcomes.[/b] The entire article is very long, but you can read it here: http://www.drskunk.com/GREENLds.htm
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[patrikantonius]

This is interesting reading but unfortunately its outcomes cannot be directly related to mj growing as the tests are made on Arabidopsis plants. I do not know how close the two plants are biologically-speaking and there is also the fact that results may vary a lot from a plant to another so I would not consider that as proof. By the way, the link at the end of the article does not seem to work.