With bright 28w Daylight light, the unique 7" XR lens and the new Free-Motion head-joint, this lamp is extremely easy to operate and reliable. The Daylight energy saving tube ensures plenty of comfortable daylight light. The XR technology makes the lens 50% lighter, extra resistant and easy to clean. And the new head-joint guarantees you precise and smooth positioning without constantly having to tighten. Includes an electronic ballast and Quick Lens Swap System so you can increase the magnification in seconds.