Search results

A resistor is not a current limiter. A resistor is used to drop voltage or for logic isolation. So your working current is 220w. You know what that means, you'll need a resistor that is rated at > 220w. At least double. The really easy way to do this is just go buy a (a few) constant current...

Goud, your plants look nice. Ever think about sog?? It looks to me that a shorter veg and trimming the bottom 1/3 would improve yield. Also I would be shooting for about .5m or less in height.

Penetration to me. http://en.wikipedia.org/wiki/Double-slit_experiment (diffuse light???) This is what I'm talking about!

The links were way too cool! Is this the current state of the art understanding? "The bonding pattern in the ring system is resonant" Hmm, wonder if we can do something with this?? The antenna pigments, also have some possibilities for manipulation or optimization. Correct me if I'm wrong...

That would be 4 to 8 mommies.

IMHO, you are doing just fine for your level of experience. (I don't do much better) Just take your time and dial it in. KISS!! You might try the art of trimming. You know how the plant grows, so next time trim off the lower bud sites and branches that you think will not get any light, thus the...

Hi, Seems like you know what you are talking about. Very interesting perspective. If you haven't seen this yet http://www.icmag.com/ic/showthread.php?t=184932 please check it out. A lot of knowledgeable people over there. I also have a thread started on building a simple easy home made led...

Yes! I agree completely, but we've been looking at how discreet (more or less) wavelengths effect photo-morphology. If you will, how efficiently a given wavelength will facilitate electro-chemical reactions within the plant cell. As far as I have found, nobody really knows how a plant cell...

Everything is a compromise, isn't it. IMHO, what we are after with leds, is the maximum number of photons for a given wattage. Unfortunately, watts translate into heat much better than photons as shown in the use of HIDs'. Here is a little paper that addresses that issue with leds...

maybe, but all of the pics I could find arn't quite right and it looks like the dragon fly nymph is much larger. Thanks

That is really too bad. Same technology, in a different box.

That could make one hell of a mess!! It's one thing to do a Ebb and Grow system with 50 gal....... Before going any further, I would be thinking about disaster recovery. Hundreds of gallons of water on the floor is not fun. Ask me how I know.

hellraizer, Do you take PH and EC measurements from the RW blocks? If so how? I have been taking some measurements with some interesting (alarming) results.

Bright! Be I should light bulb white

That is very interesting, I'd like to see a curve on the lights. The price seems about right if they are using high quality/high bin LEDs. You may want to add some 660, but I really can't say what the difference would be at this point. 88w over maybe a 3x2. 15w per sq. foot. With the MR.X...

Anyone????

Ok, good question, ahhh, but the million dollar question. Here is a little tidbit I picked up somewhere else. http://donklipstein.com/ledfaq.html#66l IMHO Petflora is on the right track. So now let me help you to get your eyes to bleed and exorcise your mind. KNNA is the most well versed...

Unfortunately, this is a little harder than it looks. Rules. 1) Good leds are expensive!! 2) Learn how to read the datasheets. All leds are not created equal. 3) Read until your eyes bleed. What we are after is the greatest number of photons for the least watts in the best(subjective term)...

Yup, I've seen them, in person no less. Too much money for what you get. If your a do it yourself'er, You can burn these at 6w. more output and better than MH spectrum. http://www.rapidled.com/cree-xm-l-neutral-white-led/

I feel your pain, I lost half my mommies and a couple of sub standard harvests to these little bastards before I figured it out.