pretty confident, I am always experimenting to see affects of light water nutrient heat. And part is fine tuning the lighting period and intensity for the new or different vegetables, that large flat light panel I showed in a post has two circuits. One is blue spectrum plus some UV emitting led the others is more red spectrum plus a few IR emitting led. Each can be adjusted for brightness manually with a knob of the power board, but both are currently connect to the same timer. Will change that to two separate programable timers soon. At present i am designing and building a dimmer controll off a simple usb port to control the light to duplicate sunrise to mid day to sunset changes of the light spectrum and intensityIs it still "experimental" for you, or do you feel pretty confident on what you're doing?