Fiber Optic Light Guides are used to transmit illumination provided by fiber optic illuminators for a number of imaging or microscopy applications. Fiber Optic Light Guides interface with illuminators to transfer light to one of several adapter heads that transmit light in a usable manner. Fiber Optic Light Guides are available in several varieties including backlights or ring lights. Fiber Optic Light Guides offer the benefits of numerous illumination products with only one light source making them cheap, effective alternatives to many other illuminators.