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Amigatec
11-30-2009, 06:23 PM
I have an area 10' long that I want to mount a light mover in. I have a 400 watt CMH bulb and reflector. Would this be to much area for this light?

nepetacat
12-02-2009, 10:54 AM
Well, you need to find out how many square feet the light is adquately covering at any given moment. Then you can take the total square feet the plants cover and divide it by that number. Then you can see how many lumens or watts per sq foot you actually have and get an idea on if you have enough light.

http://img214.imageshack.us/img214/1158/beam.png

Does anyone have any links to an explanation of how photosynthesis functions when exposed to a pulsed exposure to light rather than constant?

It may be that the 25-33% exposure time due to the light moving across the 10 feet may equal out to 50% or more photosythetic throughput depending on how those reactions occur when not in constant light. I would do some more research.

Edit:

I only found one scientific study on the actual use of light moving:

http://www.actahort.org/members/showpdf?booknrarnr=711_18

It states that the results are actually worse than stationary lights, but i would guess the idea of light moving is to save money on lights and not to maximize growing.