Comment by ben_w
Density (and wavelength), rather than total power, is important.
Sun's 1kW/m^2, and even then you shouldn't look directly at it, and being out in it all day without protection leads to sunburn.
Density (and wavelength), rather than total power, is important.
Sun's 1kW/m^2, and even then you shouldn't look directly at it, and being out in it all day without protection leads to sunburn.