Search results

Folks with an horticultural background telling you the 400-700 nm PAR spectrum is all a plant can use? I realize you are saying it seriously but you know it is not true. I realize you are playing stupid because it is annoying to your personal nemesis, but geez guy, this is not secret...

"go tech on my ass" he said. I did explain how chlorophyll uses PAR light and the plant uses more. 850 nm for tip cell division, 305 nm for terpenes, etc, out of PAR spectrum used extensively by plants for non sugar processes. Why this blindness to everything the plant consists of that isn't...

Hmph. I have to say, LED's seem to work OK for me. Weeks old pictures, buds are even bigger now, and smoke just fine, very fine. I used the sidelights with the HID room also, they help no matter what the overheads are.

I built a square out of Hydrofarm T5's with two 400 watt CMH's up top. I must say I liked the way the lower buds filled out. No longer were they popcorn. They were sucking me into the arguing in the CMH thread, so I quit visiting, there is growing to be done.

I just wanted to add that chlorophyll just makes sugars (carbohydrates) and uses those wavelengths to break water and bond hydrogen to carbon. That is not what we smoke from the plant. The regulatory lights have already been mentioned, some are out of the PAR envelope. Examples: 850 nm very...

The flower setting vegs fine as was said. I just wanted to add that while my sativa vegs OK, my indica seems to prefer the extra red. On its tenth year as a clone, maybe something changed. It was a Northern Lights in 2001.

The LED's I use are r/g/b at 7/1/2, I had to add an actinic HID to tighten up the buds. Roughly 5/2/3 now per solarmeter 9.4 and 9.6 red and blue watt meters. This is sativa, I just put in an indica. In the last budroom the indica liked more red, closer to the 7/1/2 the new LED's came with...

Penetration: An LED is providing 1000 umol to the top of a plant from 6", double it to 12" and you have 500 umol. Putting this over a 24" plant ignores the lower buds. Take the same plant getting the same 1000 umol on the top, except from 15" away. Double it to 30" and you have 500 umol...

No, the charts are correct for what the chlorophyll itself uses to break water molecules and attach the hydrogen to a carbon. The plant does so much more than just make sugar, these processes also take energy, and being such a smart plant it uses frequencies that do not interfere with eating...

I have some Northern Lights. The leaf tips where the inner half is good and the outer half has a sharp fold aimed down and dried out? I get that all the time where my fan leaves stick out and hit fluorescent tubes. Otherwise? I keep my temps in the 80's, the numbers are 83 to 86, I have tight...

That absorption spectrum for chlorophyll posted above is from chlorophyll homogenized and put in a stirred solution, the spectrum read by what comes out the other side. Plants with the chlorophyll inside and alive used all wavelengths between 380 and 780 within 12% of each other. Logic would...

I grow a tall sativa in a seven foot diameter grow area. This allows the Arcadia to be set back the 18" necessary to dilute the UVB. My testing on single plants at 122 micro watts showed 20% stunting. I put in an LED system and I got the 20% back, science kicks ass. This bud is 29" from a...

I have over 2000 watts of LED (draw at the plug), I got them for the light output not their efficiency. To say LED's are not improving fast is silly, the units I got were not available last year. In fact last year there were no units on thae market even marginally acceptable. It will only get...

I have been using the 12/1 for nine months now. The plants are marginally smaller but more mature (leaf/stem) for their actual age compared to 18/6. The only difference large enough to be obvious without rigorous measurements is the time to bud. A plant grown under 12/1 shows a difinite bud...

I found some red HID's designed for outside landscape illumination. Really proud of this find that seems to have been overlooked by the community. I purchased 3600 watts of these bulbs without a full test and relit my budroom with them. The red did look a little off but I knew this was going...

When the light (not heat) bleaches a plant it just destroys the chlorophyll. The affected parts turn white, but the leaf itself still respirates and is not dry or crumbly. Usually heat is involved and the leaf will dry out, but straight light overload only kills off the chlorophyll to start with.

I got in a rough shipped bulb with the mount on one end of the arc tube broken and the tube at 45 degrees. The wires were still good so I banged it against some cardboard until the tube was straight and turned it on. It worked for six months. I have a GE Ultra Max ballast for CMH, I have to...

Last year I bookmarked this thread while in a different forum. I find it again today and it is still the #1 tutorial available. Never thanked you the first time. Thank you.

Eleven years I worked full time and hobby grew. Last year I retired and got bored. I grow full time, or rather, this is my day job. A lot more fun than punching a clock. I have learned that pot will grow no matter what you do, to have fun is to be rich inside.

I always click on threads if I see PetFlora, I supplement with T5's and his posts and grow journal pictures have helped a lot. Without going into too much information, I seem to get plenty of blue even with red bulbs. That last UVB reading is from Reptisun 10 (3 each with 3 Florasun) at 16"...