The answer is a frequency, intensity, time, and type
Two sources of light in a kitchen would be Ceiling or wall-mounted fixtures.
Yes, Psoriasis can be on your eyebrow
Well, I'm not sure about how many cells we have, but the average human body makes about 259 billion red blood cells per day. (That's why I don't know). Also, there are about 200 different types of cells with about 20 different types of organelles.
Hope this helps!
