On the one hand, it's the midnight sun game, and a tradition.  If the visiting team is scheduled to play, they should suck it up and play.

On the other hand... the ball needs to be seen by the hitter. Play is conducted with a new, clean ball, because being hit-by-pitch can onflict severe injury and death. And has.

A future compromise might be one available light, shining down on the mound and plate, turned on only as a last resort, in a circumstance such as this.