Let There Be Light
I have a few questions about artificial light.
What kind of light is best for seedlings and young plants? incandescent, florescent tube shop lights, CFLs, halogen, LED, etc? Does it really matter?
Are there rules of thumb about how much light, i.e. candle strength and wattage?
Can they take 24/7 of light, or is some dark necessary? If yes, how much and why?