General Skin Examination with Polarized Light Lumio is the ideal device for general skin exams where an in-depth, glare-free image of the skin is essential. With its 75 mm lens offering a magnification of 2x, the power of 40 bright-white LEDs (light emitting diodes), and cross-polarization, Lumio is a great tool for a variety of dermatological exams: Varicose veins, pigmented skin lesions, hair follicles and much more. Lumio is powered by AA batteries that allow for a minimum of 250 exams at 30 seconds each. Model No. LUM is supplied with one Lumio, four AA batteries and one protective neoprene pouch.