> Every light in our house is LED and I still teach my kids about not wasting energy and turning things off when not in use. Are you certain that it's wasting

> Every light in our house is LED and I still teach my kids about not wasting energy and turning things off when not in use. Are you certain that it's wasting energy, though? You have to account for the time spent actually turning the light off, as well as for the psychic cost of having to think about whether to turn it off or on. I'm reminded of one of my old offices, where some office busybody turned off the lights in the bathroom. They were fluorescent and took awhile to brighten up, so of course this meant that one would enter a darkened room, turn them on, and then slowly get some light. Was it a huge deal? No. Did it make our lives worse than just leaving the lights on? Yes. > Maybe it’s because I grew up with incandescent bulbs, but I can’t stand the thought of random lights being left on for no good reason, even if it costs 40 cents a year to keep lit. At 40¢/year, leaving it lit costs .11¢/day, or .0046¢/hour. At any reasonable rate for your time & mental energy, it makes sense to just leave it lit.