Light box with formers for a collimating lens and slit plates. This ray box is versatile and allows all colour mixing experiments due to the hinged mirrors provided. Comprises of a bright halogen lamp with 4mm sockets.Includes a pair of slit platesSupplied without filters.Requires a 12V power supply (B8G85458 or similar).Also available to purchase with an Optical Set (B8A44106).