Effects of different photoperiod regimes on total lipid amounts of Galleria mellonella (Linnaeus, 1758) (Lepidoptera: Pyralidae) adults at different age Effects of different photoperiod regimes on lipid amounts of Galleria mellonella (Linnaeus, 1758) (Lepidoptera: Pyralidae) adults were investigated with relation to adult age. Studies were carried out at 28 ± 2 °C temperature and 65 ± 5 % relative humidity. Insects were reared at different photoperiod regimes [ (24L; 0D), (0L; 24D), (12L; 12D), (18L; 6D) and (6L; 18D)] and [ (18L; 6D), (6L; 18D) and (12L; 12D) ] for the first and second level experiments, respectively. Illumination was done with 40 W fluorescent bulbs in different photoperiod regimes. First level experiments have different light on times than second level ones. Insects were fed with honey free comb. In all photoperiod regimes, both females and males, the amounts of lipid in per 100 mg of weight decreased as the adult aging. There were different amounts of lipid on different photoperiod regimes of G. mellonella adults. Increase of dark period, caused decrease amounts of lipid. Under the same photoperiod regimes, there were increase amounts of lipid in the first level photoperiod. On the other hand, under all photoperiod regimes, there were more lipid in females than males