A 100W light bulb would use 0.1kW per hour. The key thing you'll need to know to work out the cost of running your specific light bulb is the price of electricity per kWh. The national energy price ...

The Blackout Backup Emergency Bulb comes with what Nebo calls a “power cap,” which is essentially a dummy light socket with a hook attached, allowing you to carry it like a flashlight or hang ...