Welch Allyn's patented MFI Solarc® Headlight lamp provides white, xenon quality light (5,500 deg. K) for more accurate color and clear tissue identification compared to a halogen system's (3,200 deg. K). This Welch Allyn acr light has an average life of 550 hours. The unique optical design of this head light provides 30% greater light intensity than leading halogen systems. The MFI Head Light System includes light source, fiber bundle, and headband luminaire.