The present invention is a device for determination of the presence of an installation space behind a ceiling covering for a retrofit recessed lighting fixture by way of a small probe hole. The \u201cn\u201d device array is configured to store \u201cn\u201d device array formatted data. The laser project beams of light at the ball, at a target, and at a proximate side screen to show the accuracy and trueness of a putting swing. A restoration load control process is determined, and power is restored to each of the groups simultaneously based on the power restoration control process. A sealing rod insertion slot, ,, is formed in a diametrically outer end of each compression plate, and a second spring is provided between axially inner ends of the adjacent compression plates. The compounds may be used to treat a variety of other conditions and disease states.