Light Progress has studied, developed, designed, and produced UV-C Light systems since 1987. The efficacy of disinfection systems can easily be ascertained through microbiological analyses, or simple swab tests used to identify the presence of microorganisms on the tested surfaces. Regardless, in order to precisely verify the exact microbial load present on surfaces, in the air and in water, before and after the treatment, it is necessary to carry out lab tests such as those for HACCP. Ultraviolet Germicidal irradiation systems for air, water and surfaces in healthcare and food industry.