I use three timers. One for co2, one for t5 white and red, and one for T 5 and blue. 10:30- 8:00 is Co2, 12:00 - 8:00 t5 and blue, 1:00- 9:00 t5- and red. Its a personal choice. Key here is co2 on before lights are and off before lights are off with only one photo period. 90- 120 minutes seems like a good rule of thumb to me. And if you ask me why the one photo period I can only say, "because I said so" LOL
The fastest way to success is patience.