Are bees positively phototropic
Honey bees rely on the position of the sun (and the ephemeris function) to navigate and communicate (i.e. the waggle dance). If they are out too late in the day to return to the hive (occasional), or if they are disturbed at night in the hive, they will fly towards a light. 

Beekeepers and bee renters have learned that if you are going to disturb a hive at night, do so with minimal light so as not to lose bees. Also, they avoid lights in the vicinity of the hive in general.

There are a number of parasites and insecticides that cause bees to behave erratically. Colony Collapse Disorder is a major threat to the honeybee's survival.

Why are bees attracted to light? I don't know if anyone knows that.

Dinner and Dancing: Bee Navigation
The Cause Of Colony Collapse Disorder, Disappearing Bees Becoming More Clear