NGP HF X-ray film viewers are medical devices designed for the analysis of medical images on X-ray films, which is one of the basic methods of diagnosing human diseases. The NGP HF X-ray film viewers are multiframe devices characterized by: very quick ignition of fluorescent lamps, completely eliminated flickering effect, infinitely variable adjustment of luminance. The devices do not come into contact with patients as they are devices supporting the process of analyzing X-rays by a doctor. The products are made in the 1st class of protection against electric shock. They can be used in operating theaters, doctor's offices, X-ray laboratories, etc.