You know what a Radiometer is, I have two of them.If I set them in the
Sunlight or near an Incandescent light bulb, the little black and white
vanes spin around fast.If I set them near a flourescent light, the vanes
do not spin around at all.Light, real Light has mass and pressure.In
outer Space, there are a few devices which use Solar Sails, the Light
from the Sun gives them power to soar through outer Space.

Incandescent Light Bulbs are the Best Light Bulbs.
Stock up, hoard those Incandescent Light Bulbs.Fill up your closets and
attics and basements with Incandescent Light Bubs.
In the Land of the Blind, the One Eyed Man is King.
cuhulin