You Do Need power plug adapter while traveling from San Marino to Lebanon.

Here is Why You Need An Adapter

The outlet and plug type used in Lebanon are C, D and G and in San Marino are C, F and L. This is how they look like.

San Marino

In San Marino, outlets of type C, F and L are in use.

Type C

Type F

Type L

Lebanon

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

Type C

Type D

Type G