Introduction. Fluorescent lamps are low- pressure mercury lamps. They are artificial sources of UV. As their widely used, it is important to investigate the level of the UV outputs. Methods. Forty two lamps from each of the three iranian companies to obtain 95 percent confidence limit were provided using a S2000 fiber optic spectrometer the intensity at each wavelength (UV-VIS range) was measured. Measurements were carried out at different points parallel with and vertical to lamp axis. Results. and Discussion. Lamps of company B had the minimum of energy flue (1.33 µW/Cm2) and the energy flue of company A lamps was maximum (2.48 µW/Cm2) at 10cm distance of lamp. The risk of non melanoma cancer results from exposure to the UV from these lamps relative to solar exposure are calculated.