StonedBlue said:

Thanks. Any numbers? I was under impression only like 5% of light in a tent was reflected. And that just as distance reduced light reflection reduced it quite a bit. But then I get a lot of that stuff mixed up. My mind doesn't keep facts straight like it used too.
I guess I knew I wasn't gonna get away with a shortcut. :(

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Here are lux readings using the Mylar 1mil blankets from Amazon... These blankets are nice cause they are really tall 84 inches and 54 inches wide so they cover the whole wall almost. I put the 5mil panda on the floor, it can handle abuse.

This is under some Gavita DE's cranked to 1150

Directly under light the reading is 33,600 lux
Next to Mylar is 21,200 lux
Next to some wood to block the Mylar (just for test/illustration): 11,100 lux

So at the point of measurement near the reflective surface is double some surface with poor reflection. So yes it is important if you want max efficiency.

Bulldog11 said:

reflection is very important. Look at light as fuel, and without the reflection of light, you are loosing a great deal of fuel. Also keep in mind that fuel is expensive to create.

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Say that to vert growers and you will have a fight on your hands :)

Bulldog11 said:

Your wrong. Crank up a light in a room painted with black paint. Then start the same light in a room with all white paint. You tell me it's fools gold.

I play pool all the time. Difference is a pool ball is traveling at 10mph and hits two or three walls. Light is traveling at 180000 miles a second, and bounces off thousands of walls before the light is lost. No doubt in my mind, its a must.

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Yesh, i love scientific contradiction from someone who can't even spell! lol

My new veg room project, lots o reflection goin on.