Light has a tendency to zoom off at, well, the speed of light, and colliding with objects causes it to lose energy. There have been some experiments in slowing down or "stopping" light although they involve some elaborate setups that almost certainly use more energy to trap the light than you'd get from storing it.

You could also store it in or orbiting in a black hole, but good luck getting it back in its original form! https://en.wikipedia.org/wiki/Photon_sphere