You Do Need power plug adapter while traveling from Bulgaria to Bahamas.

Here is Why You Need An Adapter

The outlet and plug type used in Bahamas are A and B and in Bulgaria are C and F. This is how they look like.

Bulgaria

In Bulgaria, outlets of type C and F are in use.

Type C

Type F

Bahamas

In Bahamas, outlets of type A and B are in use.

Type A

Type B