If you were the kind of person who gets annoyed by low levels of light (e.g., when trying to sleep) then you would've noticed by now that putting a light inside

If you were the kind of person who gets annoyed by low levels of light (e.g., when trying to sleep) then you would've noticed by now that putting a light inside something with as many holes as a computer case does not block all the light. (Also computer hardware vendors seem particularly fond of blue LEDs, which is the most annoying color to some people.)