I like to stimulate the appropriate photodetectors directly. I have a bank of blue leds aimed at my white ceiling. They are on for 12 minutes every 2 hours for

I like to stimulate the appropriate photodetectors directly. I have a bank of blue leds aimed at my white ceiling. They are on for 12 minutes every 2 hours for the 12 daylight hours (7 times a day). The first lightcycle in the morning is for 24 minutes as the 12 minutes did not seem to be enough.