... W Microscope Fluorescent lamp Microscope ring lampCompact structure, nice looking, low heat, soft lighting1.All-in-one design, compact structure, nice looking ... retarding.3. Using high quality electronic component, because of the ring design, illumination section have no shadow.4. The maximal joint size ... 8W. Input voltage: 110V/220V/240V, you can choose. microscope ring lamp fluorescer lamp