Lighting -Coverage Question?

I have two 400w HPS (fluorescent in between) in a 5x5x8 room. Do I need two move the lights on occasion (as they are not on a track in order to make sure all plants get coverage lights are 14 inches (plants directly below lights) above plants, But some plants as much as 30 inches away?

Dude, you really need to learn about "The Inverse Square law" (for the propagation of light)!

Do yourself a favor and spend a little quality time on "Google".

As long as your light isn't too far or close to the plants, then instead of moving the lights, you should rotate your girls every so often.

Wanna Learn said:

As long as your light isn't too far or close to the plants, then instead of moving the lights, you should rotate your girls every so often.

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Been doing that but they are about 4 feet now. Thanks for your input

In regards to the laws for the propagation of light I am aware of this formula and therefore know I asked a dumb question. I believe it states as you double the distance from your light source you only receive 1/4 of the energy.

I have a 4'x6' growing area and I use a 600w on a light mover. Works great! I still use a couple cfl's on the sides and lower branches

Dirtfree said:

I have a 4'x6' growing area and I use a 600w on a light mover. Works great! I still use a couple cfl's on the sides and lower branches

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I have 2 400w HPS and a fluorescent in the middle. The room is 5x5x8 (bathroom) painted glossy white. I've been told that should be good but some of the plants seem a little to far from the light so I've been moving them (lights) a couple times a day to cover the whole room. I was rotating the plants but they are 4 feet tall now.