Many times, we are all in the drawing room ( hall ) and the lights are on, in the bed room or kitchen.
Or vice versa. Walking through your home or office and turning off lights that aren’t in use takes
almost no time. It’s one of the easiest acts of green you can do.

Turning off one 60 watt light bulb four hour a day will save about 85 kWh (kilowatt hours) per year.