This LED Array is a clever way to demonstrate color diffraction and the effects of colors on wavelengths. Show students the diffraction patterns of colors through use of 11 vertically mounted LED lights in different colors (violet, deep blue, blue, turquoise, bright green, green, yellow, orange, red, deep red, and white) that can be switched on individually or all at once by turning a rotary switch on top of the LED array. Each color bulb has the color’s name and its wavelength printed on the 12″ metal tube. Additionally there is an on/off switch on the back. Uses a 110V adapter and includes a Teacher's Guide.