An EL lamp consists of light emitting phosphor sandwiched between two conducting electrodes one of which is optically transparent allowing light to escape. As an AC voltage is applied to the electrodes, the electric field causes the phosphor to rapidly charge and discharge, resulting in the emission of light during each cycle. Since the number of light pulses depends on the magnitude of applied voltage, the brightness of EL lamps can be controlled by varying the operating voltage and frequency. Technical Data: Operation range: 25-180V optimum operating voltage: 115V Operating frequency range: 50-5000Hz Optimum operating frequency: 400-600Hz Power consumption: 3-5milliwatt/cm2 Resistance: Static capacitance: 0.4nf/cm2 half-luminance time: 8000 hours (100V,400Hz) Screen thickness: <0.45mm (with protective layer) <0.25mm (without protective layer) Working temperature: -10 to+60 celsius degree Relative humidity: 90% Uneven brightness: <5%