Fluorescent lamp height
I bought this two bulb T8 fixture with daylight bulbs (6500 K) and a digital timer at home depot. I set the timer to come on 5 minutes before sunrise and shut off 5 minutes after sunset. The fixture is currently 30 inches above the table, 17 inches above the barrel cactus. I set the light kinda high to allow the plants time to get used to the light. I plan to move it down a bit every few days.
Am I being too cautious? Should I just set the lamp right above the plants? Also, do you think it's ok to keep the light on as long as it's light out or would it be beneficial to keep it on longer? Maybe 14 hours a day. Lemme know what your experience has been.