Possible yes, special searchlights could be made with their left, right, up, and down limits set in the xdp so they cannot move and only point in one direction. Then you would need to know, or estimate how far apart the three searchlights are from each other, and then do some math so that the direction you have it pointing with the limit settings has them all intersect at the level of the cloud base. The problem is, you would have to do this whole process for each location with each level of cloud base, including a new set of searchlights and facility for each combination.