Stiffler :- How do you say darkness doesn't have energy? if you say light has energy darkness do have energy. (yet more research needs to be done in order to claim darkness as an energy).

Suppose, if you switch on the light it should have light all the time if the darkness doesn't have energy. It is the energy that comes out of darkness that fades away the energy of light when you switch of the light.  Also it is the energy of the light which fades away the energy of the darkness when the light is switched on.

We see light because the energy comes out of the light (may be photon (i don't know what its called)) sparkle the airparticles in our environment and is visible. We see darkness because the energy that comes out of darkness sets-off the sparkled particles and is invisible.

In simple term its like , Setting off the fire with water where both fire and water are energy.