My family has always debated this question: Do some people get bitten more by mosquitoes or do they just react more?
If I am on table with 10 people and there are 2 mosquitoes, both of them will come and try repeatedly bite me. They will not go near the other 9 humans whatsoever (sniff them out).
-Bram Stoker, or someone.
It stands to reason that different people put out different amounts of the various things that attract mosquitoes.
So in my own experience light does seem to be a factor somehow
Out of curiosity, what are you doing with the light off? Just sitting in the dark?
But there's a lot of street light as I live in a big city, so I can do with that (it's fine as long as it's brighter outside). I also have some xiaomi battery-powered motion-activated night lights to move around. My screens and TV are adjusted to low brightness and dark mode through automation. It works out ok for me.
I can basically do my normal activities with some exceptions. For example my Oculus quest tracking doesn't work. But I don't want to wear that in the summer heat anyway.
I don't think it's heat as I only have LED lights. Also, mosquitoes are far from the only troublesome bugs here. But keeping the lights off really seems to help for them too.
Over time, you can develop a tolerance to the bites. I definitely had this happen while living in SE Asia for 4 years... when I first moved to Vietnam, I had bites all over, after a while, I stopped reacting to the bites almost entirely.