A “normal” incandescent bulb costs about 0.75cents per hour, and LEDs or CFLs cost only one-sixth of that – so leaving the lights on (either overnight or while you’re at work for the day, say both are about 8 hours) costs you roughly 6 cents for a normal light and a bit over 1 cent for modern bulbs.
Can I leave LED lights on all day?
Leaving your LED lights on all day isn’t quite as costly, but it’ll still cause a significant dent in your annual energy bill. 45 LED lights left on while you’re at work will cost you an extra $180 a year.
Is it cheaper to leave lights on?
Fluorescent lights do take a small surge of power when turned on, but this is significantly smaller than the amount saved by turning them off. It used to be that starting them shortened their life, but again this is not significant. It’s always better to turn off modern lights if leaving for more than a minute.
Does turning lights off save money?
Turning off your lights saves a bit of energy, sure. However, things like your water heater or air conditioner use tons of energy. Far more than your light bulbs use. That doesn’t mean that you can’t save money and energy by switching off the lights or the TV.
Should you leave a light on at night?
Most of the time, you can leave a porch light on. When you’re home at night, you should leave a light on. It alerts burglars to your presence, particularly if indoor lights are on too. The porch light also acts as a spotlight on the front door.
Photo in the article by “JPL – NASA”