The brilliant white LED of the Lumindex 3 LED Transilluminator is ideal for diagnosing tooth fractures, detecting carious lesions and calculus, and locating hard-to-see root canals. A single press of the convenient ON/OFF button produces a high-intensity 30,000 lux beam, while a second press delivers lower-intensity 15,000 lux output, and a third press turns the unit off. Lumindex 3 features an automatic power compensation circuit for consistent, constant output during the life of the batteries, as well as a low battery LED indicator. Five-minute auto-shutoff conserves batteries.