I would have voted always off before I decided to try out the electrical tape wrapped around like a cany cane and they're just as active this way...I have a double strip 48" light housing but I only need one of the lights actually in there wrapped with the tape and its enough light to see them well and take great vids and pics and not too much light to where they freak out when I turn it on.
i voted somtimes on/off ,i have mine on a timer comes on at 4pm and goes off 1am ,i have used lights only 1 36'' tube since they were babies and are ok with light i think if you use a timer they get used to a routine and when lights come on they dont even move and dont mind at all
My room is made in one of the 2 garages we have. During the days I have work, its completely dark in my room for them to sleep. When I get home, thats when they wake up and get all active with the regular room light. Before going to sleep, I turn off the room light and turn on the tank light which is blue until it gets dark for them when I go to work again.
Day time in the tank when I come home, Twilight in the tank when Im sleeping, and nighttime when i go to work.
They actually like the cycle.. not skittish anymore, even when I tap on the tank.