I like to use the wall mount brackets if we are mounting a dome in sunlight, even if it's for a couple of hours per day. This keeps the sun off of most of the globe on the outside and helps it last a little bit longer. Flush mounted domes will get blasted by the sun and you will see effects, from the sun, through the camera pretty quick. If you are mounting domes inside, you don't have much to worry about. We have been using the wall mounts for the turrets also. It gives the installation a clean look in a commercial application.