One day I had found some bees have come around the light source like other positively photo tropic insects, I hadn't seen any bees coming over light before. I think bees are diurnal and they don't leave their nest at nights, I also read from an article that parasitic wasps may attack bees and these attacked bees would lose their mind and leave their nest at nights.
Is this possible or any other reason behind the night travel of bees and their positive photo tropism ? http://en.wikipedia.org/wiki/Apocephalus_borealis