You have a driveway with 5 lamps that each have 3 light fixtures, for a total of 15 fixtures. Each fixture uses a 100 watt bulb. At $0.12 per kW hour, and the lights being on from dark to daybreak daily, the cost to power these lights can be calculated.

1. You have a lighted driveway - there are 5 lamps with 3 fixtures
per lamp - the manufacturer states use no more than a 100 watt
bulb in each fixture. At a utility company cost of $.12 per kW
Hour what are these lights costing you? Oh, and they are on a
timer set to turn on at dark, and off at daybreak.
Please show work?