6 Since we're installing a Deluxe interior, we need to add the courtesy lights to our door shells. We get this question quite often, so listen up if you've been thinking about adding these. The opening is 5 inches long by 2 inches high. The opening is set forward from the door edge by 5 inches and is 11/2 inches from the lower edge of the door. When cutting the hole, be cognizant that the mounting ears (which the screws pass through) differ from side to side. You should be able to use the light housing to make your own template.