lens size:5 inch Diopter:3 D/5 D/8 D Light source:T4 22W fluorescent energy-saving bulb Color: white,black Our products are practical multifunctional magnifying lamps with professional designed electronic ballasts by our engineers.They are widely used in electronic,medical,beauty care,jewellery,laboratories,schools,hospitals and optical industries.And they are also useful for artists,craftsmen, ...