With lighting for fish IMO and CB1's experience it is best if low lighting is used. Sometimes it is best to not keep the fish in total darkness but in full moon light brightness for the dark period. Very dim light is good esp at first turn on. Then the light can be increased gradually to a brighter dim. Good luck on this project. A lot of the members are interested in your experiences. Please keep us updated. We will learn together.
If you don't know anything about lighting for the application, it's probably best to go with with your current situation and run with it.
Dimmer switches are going to start at > than 10% with the click. You need some custom circuitry in front of the best ballasts available to start at zero and then you can shove a 0-10V Analog signal to it.
If you require light, which you should, just use incandescent bulbs.
Some have had success getting hesitant fish to first eat artificial by using current to move the food to simulate it as living.
Not a simulation, but a stimulation!
Upwelling currents will keep the feed suspended for a short time to get a natural response to go after whats in front of them. Hopefully you are using high quality stuff for feed training picky fish.
