Are these films good for perimeter installation? It will be installed on the inside of the window, but gets direct sunlight for the last half of the day. The glass is Dual Pane, Clear Tempered glass.

Yes, this shade of film will work well on the interior side of the exterior windows and be safe. You could also try this one which is the same color shade, but designed for solar control. https://www.decorativefilm.com/ultraglare-g035-light-shade