Most lithium-ion batteries, such as the Tesla Powerwall or Generac PWRcell, have a power rating of 4 to 5 kW or higher and 10+ kWh of usable capacity. All widely used home batteries can power a light bulb. A battery will be more than adequate for providing backup power and running several light bulbs, even for extended periods, as each light bulb consumes roughly 60 W (0.06 kW) of power.