4,166 footcandles (Standard model). Color temperature of 3700°K. Cool housing temperature and low infrared; light can be in continuous use for hours without causing discomfort to physician or patient. Standard Model produces a spot of 6″; Wide Beam model produces a spot of 16″. Easy grip ridges. Optimal form and function; 17″ (43cm) rugged gooseneck and 16″ (41cm) extension arm. Trouble-free design; 4,000 hour 35-watt halogen bulb.