A method of charging a light bulb is disclosed. A processor within the light bulb detects a state-of-charge of the battery and if it is below a predetermined dynamic battery state-of-charge threshold then the transceiver sends a wireless signal from the light bulb to a remote light switch with instructions to supply power to the light bulb. The predetermined dynamic battery state-of-charge threshold may be determined based on historical light use data during an on-peak energy time period. The predetermined dynamic threshold allows a battery in the light bulb to supply energy to the light bulb during on-peak hours and recharge during off-peak hours.