Flourescent Lighting

[Ross]

I really doubt this little bit of light is causing the purple. The goal isn't to get the leaves to turn purple just to attempt to provide a high quality lighting withing the range they can tolerate. The only way to determine what amount of light is there, is to get a high quality dependable light meter and measure it. Charts that I've seen are a quickie way, but hardly the final answer since so many things can affect the actual output. I run one 105watt CF and 2 55 watt CF in the same area. This is the actual wattage being drawn by the lamps. I only read approx 800 foot candles off the sides of the lamps. This is marginal for Phals and insufficient to bloom many others, but they grow ok. I don't get purple leaves on the phals.