LED viewing lamps, as the name suggests, use semiconductor light-emitting diodes (leds) as light sources. It is mainly used for observation and analysis of X-ray film (355mm*432mm) in the operating room. It requires uniform light and brightness to meet the requirements of viewing films. LED viewing box can be divided into single, double, triple, quadruple, six, etc., according to the number of viewing films. Conventional use is quadruple, six.