Is it a mental thing? Like does the absence of light trick our brain into thinking the room is cooler? Or, is it a physical thin, where the lights are producing enough warmth. Not any fancy lights though, just regular room lights
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They are colder. Even minorly, your light bulbs produce heat, anything that produces light produces some amount of heat, most materials store heat, in a bright room you’ll find over time the surfaces will be slightly warmer. You also tend to be more active when it’s bright which means your body heats up and your surroundings can leech that heat leading to an overall increase. Many other factors but they’re a good portion of the ELI5 ones.
Unless you’ve converted to all LED bulbs, your lights likely are putting out significant amounts of heat that you don’t realize.
If the bulbs are an older kind, it’s possible they’re adding heat to the room. Also, if the light is coming through a window from the sun, that heats up rooms a LOT.
Biologically our body temperature drops at night as the sun sets. Could be a real or conditioned association between dark and cold.
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