Yea my ceiling height is like 8ish feet... My whole room is sealed..

I dont want to clug this thread up.. Just trying to think what I should do..

So one, 1,000 watt light will cover that whole area with no problem what so ever?

I will be running a home made ac unit out of a cooler with soda bottles filled with water frozen.. I had ice in the cooler and was pushing 62 deg's...

It got my room down to 68... Now since Im doing c02 I want the room around 82 deg's right> And have it drop 10 deg's then what it is during the day so say 72 deg's at night? Maybe I will get the 1,000 watt and 2/3 90watt ufo's...

No problem. This thread was just supposed to be a quick pic.

So, go ahead and sort it out here.

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-Michael

Thanks bro...

A 1k should have no problem lighting up a 4X6. Even with a sealed room you should run an air cooled, glass sealed reflector which you can vent by pulling air from outside the room through the light and exhaust outside your room somewhere. If you have enough btu/hr of cooling you may not have to do this, but cooling your light this way is the most effecient watt for watt.

This might help: Lighting Facts - Marijuana Forum

OH YEAH im def going to cool the light.. I remember my 400watt light running was putting the temps in the 90's lol.. I guess I will run this 1000watt for this year then save up for my LED lighting that michael pushed me on lol.. I think when I have enough saved I will go with 2 or 3 of the 300watt systems you have!!

Depends on how tall you wanna go. If you wanna keep them fairly short, I think a lot of 180s are better than half as many 350s.

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-Michael

With 8 foot ceilings, he should be able to grow some fairly tall colas. One of the best things about LED tech in my opinion is the fact that it is not effected by the inverse square law, but rather, finds the intensity of its light diminished based on the diffusion of the LED itself, measured in degrees. An LED with the correct diffusion could produce light which offered equal intensity to the bottom of a four foot cola as it did the top (or nearly equal, much like the sun)

It seems to me that the most effecient way to make use of LED in a room that had the ceiling height would be to run a given wattage of LED mounted as high as possible with a given set of degrees of difussion such that the lights foot print was equal to the widest, lowest part of the canopy. This should allow plants to grow as if they were in sunlight (given the propper intensity and spectrum).

You often see something similar to this when one mounts MANY 1ks very high above the plants in large room, but the LED would offer more potential without needing such a large space. Of course each panel would need to be designed with specific height and canopy requirements.

I beg to differ: http://www.pmodwrc.ch/newrad2005/pdf.../Newrad044.pdf

It's a slightly modified law. But, the effects are comparable.

"Modified inverse-square law fitting for the green temperature-stabilized LED is presented in Figure 2 as an example of typical results."

Attached Images

inverse_square.PNG (11.1 KB, 6 views)

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-Michael

What are you disagreeing with? You say the effects are, "comparable." The effects of reduced intensity in any form are, "comparable" to the inverse square law.


Are you saying that the intensity of a 10 degree LED light will be the same as one that puts out light over 120 degrees at a given distance?

The inverse square law applies across the board to single point source of light which emit their light in all directions. LEDs with varying degrees of diffusion will produce varying intensities at equal distances. You can modify an equation for a given LED, but how do you expect to use one equation with the only variables being the distance from light to measure the intensity fall off of 2 LEDs with separate degrees of diffusion? As is done with the inverse square law.


EDIT: reading the pdf, it seems to be confirming what I have said, by creating an equation which takes into account the variables related to LED which make it NOT EFFECTED BY THE INVERSE SQUARE LAW. Short answer; "modified inverse square law" does not equal "inverse square law", and in fact, aside from what they are measuring (luminous intensity), they are two entirely different animals.

I just tested this using an LED flash light which throws its light out over fewer degrees than an LED light bulbs like device I had here. At given distances the 2 LEDs see their luminous intensity fall off by different amounts. The flashlight is less effected by being placed farther away, but covers less of an area. As one would expect. And neither one of them sees their luminous intensity fall off at the rate which one would see applying the inverse square law. Hence, "Leds are not effected by the inverse square law, and the fall off of their (different LEDs with different degrees of diffusion) intensity as a measurement of distance will depend upon more than simply that distance"

Using the equation you posted, one would be able to do what I am describing above, creating a luminous intensity which was at a given level at the bottom of the colas, and mounting the light sufficiently high so that the difference in intensity between the top and bottom of those colas was as minimal as possible. A 0 degree diffusion (would look like laser beams) would be as close to what the sun provides (essentially no loss in intensity) but is almost certainly not practical.

so with my 2 aereo's setup close to each other it is a 5x5 growing area.. Will one 1,000 watt light work well in this area?

Yes.

How are these NextGen 1000 Watt Digital Ballast

The Quantum Digital : Dimmable : ballast..Haas anyone tryed those?

You're right 6951A. I misunderstood your original post.

I picked up two 90W UFOs from prosource to go with my 8 bulb T5 monster light. However after reading the thread I feel like I should've have picked up 2 180 w. Hopefully the 90Ws will do the trick. The grow will take place inside a closet. The measurements of the closet are 52 inches in length; 32 inches in width; and 6 feet in height from the floor up to where the T5 will be attached to. Undecided where to place the ufos.

Dez, you didn't call Doug? He would have talked you out of the 90s.

I would have, too. But, I thought you were gonna talk to him. :(

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-Michael

Hey Michael what company do you work for. Do GP members get a discount? Can you give me link. I usually shop from HIDHUT or my local hydro store.
Also do you guys sell grow tents? I need a tent that is no higher than 64 inches and 4x4 wide

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Disclaimer: I do not buy, sell, cultivate, manufacture, or use any illegal substance. Any postings I make on this forum are purely for entertainment purposes. Any pictures that I may post have been created by artificial means from images gathered from the internet and other sources. Any statements made should not be considered truthful.

We had email exchanges. He didn't talk me out of it, seemed to think it was fine for the setup I had. He did hint at forgetting about the t5. That's about it. Geez, you're making the 90w seem like duds and I haven't even gotten them yet. :( I was excited now I am depressed.

No, they aren't duds, at all. If your space is small, you will be fine. I just happen to really like the 180 is all.

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-Michael

The link is in my sig. We have tents. But, not that small, I'm afraid. We don't have any sort of formal discount policy. But, you can always ask Doug for one. It couldn't hurt.

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-Michael