This includes the correct setting of photoperiod for your reptile pet. (beardeddragoncare.net)
To have an appropriate photoperiod for bearded dragon, an economical way is to switch on and off the lights manually. (beardeddragoncare.net)
Gutzler, S.J., Karom, M. Erwin, W.D., and Albers, H.E. Seasonal regulation of social communication by photoperiod and testosterone: effects of arginine - vasopressi, serotonin, and galanin in the medial preoptic area - anterior hypothalamus. (cbn-atl.org)