I'm from India. Lighting in my middle class house, since forever, has been poor. I never consciously felt it when I was still studying. Just that the rooms were dark and I would prefer to play/study outside, or in the front room, where the door was always open, allowing a lot of sunlight.

I realized the lighting factor a few years back. Now, My own home has two lights in every room and whenever I am studying/reading/cooking, I always have them both on.

The difference is stark. Perhaps I am clutching my pearls when I say this, but I feel my quality of life has improved with better lighting.

I also got my walls painted with very light colors, and the ambient light is just amazing.

Good lighting is a blessing.