> the light won't give you cancer There are studies that suggest that city lights increase people's risk of cancer. Sleep studies have shown that exposure to b

> the light won't give you cancer There are studies that suggest that city lights increase people's risk of cancer. Sleep studies have shown that exposure to blue light suppresses melatonin [1]. Studies with lab mice have shown that melatonin suppresses tumor growth. I don't know how solid the science is on this, so take it with a grain of salt. [1] This is the reason many people use f.lux (https://justgetflux.com/ https://justgetflux.com/).