In reply to Mike's question from this
post in the Growing Spaces thread...
I use a light meter. Top shelf lighting has two 3300 lumens regular fluorescent lights + 2800 lumens of the
Natural Sunshine lights. Bottom shelf lighting has two 3300 lumens + two 1600
Plant & Aquarium lights. Each light is 40 watts.
Could it be that my metallic light fixtures are helping increase the light levels? Maybe.
Tomorrow, when the lights are on, I'll try using my digital camera to measure the light intensity and post my results when I get a chance.