If they use heating at all (and not just AC) and have a thermostat as everyone else it would automatically account for the extra heat and not run the furnace as much. This is also why a blanket ban on incandescent lightbulbs is silly.
Yes on spectrums, I’m also sensitive to flicker and it’s hard to find LEDs that consistently don’t (I understand that it can be done with some circuitry - but then again I could just not use LEDs).
Late to the party, but using low watt incandescent bulbs to stop small compartments from freezing in winter is a classic off grid cabin and camper van trick.
