Make it easy for students to observe ray optics and color experiments on a whiteboard using this magnetic-back set. Contains a double-ended light box and comprehensive set of lenses, all with heavy-duty magnets for use on a whiteboard. The light box has a strong 12-V, 20-W halogen lamp powered by a wall-mount AC adapter. Includes instructions and comes with whiteboard.  Set with Board  (whiteboard is 23 ×15-1/2") ships in 2 boxes.