[dsego]

I've read that the amount of natural light is important, and that the light inside buildings and houses is not sufficient. Children should spend more hours outside.

[bombcar]

If you have a light meter (on a camera or phone or standalone) it’s amazing how “dim” even the brightest indoor lights are.

Full flood wash on a stage is nothing compared to the power of the sun.

[wlesieutre]

Some example values here

https://en.wikipedia.org/wiki/Lux#Illuminance

Office lighting: 250-500

Direct sunlight: 32,000-100,000