Joined
·
1,997 Posts
For a NPT, Diana Walstad has recommended a 12 hr photoperiod although including a mid-day "siesta" period of 2-3 hrs is okay. As further experimentation is done I'm sure the recommendation will change (or maybe it already has). I've had good luck with the long day and a mid-day break. My tanks never get really dark during the mid-day "siesta" because of ambient lighting.