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

Here is Why You Need An Adapter

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

Pakistan

In Pakistan, outlets of type C and D are in use.

Type C

Type D

Bahamas

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

Type A

Type B