I'd do flush outside, or even a recessed ......or mount ( sconce type ) on the house exterior, left and right of foyer door......if possible

How large and how high the interior foyer?

It is roughly 6' x 6' with a 10' ceiling.

Yes, the hanging INSIDE. And perfectly great with two on sides of door. If this is a build? You want exterior selections well in advance...........they require specific backboard and wiring, and after a home is FINISH clad, is TOO LATE .