Ca-α1T^Rescue homozygous adults previously trained under 12h:12h light:dark cycles show a significant increase in sleep time during the subjective light period when kept under the same 12h:12h light:dark cycles, but not when kept under constant darkness, and show insignificant changes in waking activity, sleep bout number or sleep bout length regardless of being kept under the same 12h:12h light:dark cycles or being kept under constant darkness, as compared to controls.