orbs or reflections of light as many see them dude can be misleading, every one has their own views on this subject.mine are simple and plain. ghosts or spirits as some refer to them are nothing more than a figment of your imagination, i remember a ghosty type situation where i visited a so called haunted place and a chap had just been hysterical having been sat in a room with a cup of tea and his friend and claims a ghost walked across the room and straight through the wall, yet his friend next to him saw nothing and both people having normal good eye sight,well i hate to put water on anyones fire but i placed an apple as far across the room as i could and asked them both if they could see it and yes sure as eggs are eggs they could,the reason for this is because it was truly there and not a figment of the imagination.the mind is a wonderful thing but also remember a frightened mind can and i believe does play tricks on people