In case you’re wondering, the AC unit in our bedroom costs $0.16/hour. The living room costs $0.50/hour.
My wife is trying to make me stop. She says it’s annoying.
I like this take as you take into account the human element, but might even take it a step further in that this kind of knowledge could actually be good for more people to know this cost. Especially if cost is an issue, could help families work together in easy ways for a common goal. Maybe it’s not worth it to say anything during a heat wave to save a few bucks, but on a cooler week maybe open some windows to save some cash sans suffering.
Extreme example: as a dad I feel a cultural obligation to get upset when random lights are left on when no ones in the room (not really, but does beg the question of why) - when you actually do the math on led lights it ends up something insignificant, like a cent. Not an issue that really deserves any attention.
If I got this right, that isn’t even an extreme example, it sounds for me like you’re trying to drill your children into attentiveness - like, “pay attention to what you do, what you don’t, and the impact of your actions”.
And even in the case of working towards common goals, to cut corners, I think that the parents can and should tell the children what’s going on. Children can be surprisingly reasonable once you’re reasonable with them, and that avoids the whole “oh no, mum/dad will scold me if I leave the lights on”.
For a more extreme example: afternoon in a rather sunless city, child with poor sight is studying with the lamps turned on, shithead turns off the lights and wastes 15min of the child’s studying time by screeching on how the kid is wasting its money. This is the sort of thing that should be avoided at all costs IMO, as it’s outright immoral - we humans should be have money for more comfortable lives, not cause the others’ discomfort to hoard money.