This is a guide for a small 150W halogen lamp on this Instructable here: http://www.instructables.com/id/A2-overhead-corner-LEDs-lightbox-platform-extensio/ This keeps the lamps square and stable on the platforms.Print with 2 "rails" on bed. I did not use supports. There may be some superficial "stringing". File if needed to slide easily on top horizontal MDF surface with legs gripping sides.Insert on Lamp base tubes. Secure with 4G x 15mm self tappers in holes in side. Slide and adjust i-situ if needed.