All NuOptic illuminators come with a standard bracket intended to be used for mounting to a vertical surface. This standard bracket allows a vertical angle adjustment range of 90 degrees down to 35 degrees up. For mounting to a horizontal surface (rooftop or parapet for example), NuOptic offers a horizontal surface mount (VIS-1000-HM) which has a vertical adjustment angle of 60 degrees down to 90 degrees up. If both horizontal and vertical adjustments are required, NuOptic offers the Premium Pan and Tilt Wall Mount (VIS-1000-PWM) which has a vertical adjustment range of 90 degrees down to 25 degrees up and a horizontal adjustment range of 90 degrees left to 90 degrees right. All three of these brackets are designed to mount directly to our pole (VIS-1000-PM) and corner (VIS-1000-CM) mounts. If your situation has specialized mounting requirements please contact NuOptic support, we can likely offer a solution.