hello this is anmol buber from india

i have a ques regarding a candel it goes like this

there is a burning candel inside a box(closed from all the six sides) made from mirror(inner walls). an observer is placed inside the box, and after some time candle was switched off.  MY QUESTION IS if there is no energy loss then whether the observer could see the light or not ?????

plz rply as early as possible

thanx,

anmol