Medium-pressure (MP) UV lamp A medium-pressure (MP) UV lamp has some important differences compared to the more well known low-pressure (LP) UV lamps. These differences are major reasons to select UV systems with medium-pressure lamps: high power energy efficiency compact size reduce quantity needed in a UV reactor broad range of wavelengths (200 – 400nm) photobiological effects Some applications may require the use of medium-pressure UV Lamps because they emit a broader range of wavelengths. Such applications include: dechloramination in public swimming pools (reduction of all chloramines, mono-, di- and trichloramines, only reached by the emission of wavelengths between 200 and 400nm. Two other important reasons to use medium-pressure UV lamp technology is: to reduce the footprint of the installation, as high-powered medium-pressure lamps greatly reduce the size of a UV reactor. to reduce the quantity of UV lamps because medium-pressure UV lamps have higher power fewer are required compared to a low-pressure UV lamp systems. Low-pressure (LP) UV lamp Low-pressure (LP) UV lamps have some important differences compared to medium-pressure (MP) UV lamps: low power efficiency larger size greater quantity needed in a UV reactor limited range of wavelengths (254nm) emitted Some applications use of low-pressure UV lamps, mainly because of: low capacity (single UV lamp) frequent STOP and GO operations Two other important reasons to use low-pressure UV lamp technology are: high efficiency of the lamp, up to 40% of the power converts to germicidal energy, specific 254 nm wavelengths, well known for disinfection purposes. Contact the ‘experts in ultraviolet light’ for selection of the right lamp technology in FIVER UV systems in new or existing situations.