Features 12 watt circular energy saving fluorescent tube Built in close up lens 12 dioptre (4 x Mag.) Ergonomic design with adjustable table base Fluorescent Daylight Magnifier Table Lamp Height with lens in horizontal position 375mm (15ins) High quality 100mm (4ins) glass lens 3 dioptre (1.75 x Mag.) Shadow Free Light with no heat emission Very light - suitable for mobile use