Is it possible to arrest light in a perfectly reflective (Inside) container???

If so why not we save this in micro or nano packets and reuse it for our lighting purpose, else why not we use this to activate photo cells to produce electricity in placed where there is no constant source of light.

May be in earth, else during our outer space expeditions. This is something which I am thinking from my school days. Most of my teachers avoided to answer this question. This is still a question for which I do not have a answer, or am not sure if it is practically possible.

This thought of mine is surely out of proportion in today's standard. But surely not out of track, since man is already planning to propel space vehicles with nothing but beam of light.