... structure, nice looking, low heat, soft and natrual light Fluorescent Microscope Circular/Ring Lamp YK-8W-60 Specification1:all-in-one design, compact structure ... retarding3. using high quality electronic component, because of the ring design, illumination section have no shadow.4. the maximal ... 8W. Input voltage: 110V/220V/240V, you can choose. Fluorescent Circular Lamp Series:YK-8W-58 YK-8W-60