Hi, I am not a physicist, please excuse obvious mistakes and tailor replies for the layman. I have a balloon, the interior of which is a perfect mirror. I have a cork which fits perfectly in the balloon and is also a perfect mirror, and seals perfectly. So basically a sphere the interior of which is a perfect mirror. I have a vacuum chamber in a vacuum chamber. The inner vacuum chamber is used to inflate the balloon by lowering the pressure outside of the balloon. The pressure inside the baloon is lowered by its exposure to the outer vacuum chamber (Hmm, I mean the ball is inflated, but contains a lower pressure than atmospheric). The vacuum chambers are transparent, so light enters the balloon as it is inflated. The balloon is corked with the perfectly mirrored cork. So I now have a balloon full(?) of light that is not going anywhere. Is this possible? If I release the vacuum chambers I will compress the balloon as the atmospheric pressure applies to the outside of the balloon. I now have stored compressed light. Is this possible? I uncork the balloon in a dark room. The light rushes out providing a brief illumination. Is this right? I guess I am asking if light compresses?