This 3 diopter lamp has 28w Daylight light (150 equiv.), plus a lightweight 7” XR lens and the new Free-Motion head-joint™. These new features make it not only extremely strong but also surprisingly easy to position and use. XR technology makes the lens 50% lighter, extra resistant, and easy to clean. The new head-joint guarantees precise and smooth positioning of your lamp without constantly having to tighten the wing-nut. This lamp also includes an electronic ballast so you can work longer in comfortable light, and it has the Quick Lens Swap System™ so you can increase the magnification in seconds without any tools. UL® Listed