The ultimate magnifier lamp includes a precision 30â€ spring-arm and convenient guide handle for easy positioning. Included full-spectrum 13W fluorescent tube simulates natural daylight. Features one 4.5â€ three-diopter magnifier lens, one 1â€ five-diopter magnifier lens and one 1â€ eight-diopter magnifier lens. Enlarges small print up to 175%. Includes a convenient edge-clamp mount. On/off rocker switch located on magnifier head.