There is disclosed a marine air conditioning system and a process for cleaning and maintaining the marine air conditioning system. The marine air conditioning system may comprise a marine air conditioner, a bracket and a germicidal lamp. The marine air conditioner may comprise an evaporator coil and a drain pan. The evaporator coil may include a surface. The drain pan may be disposed below the evaporator coil. The bracket may be attacked to the marine air conditioner. The germicidal lamp may be upstream of the evaporator coil. The germicidal lamp may receive mechanical support from the bracket. The germicidal lamp may be adapted to emit ultraviolet radiation at a wavelength substantially at 253.7 nm towards the surface and the drain pan and generate an insignificant quantity or less of ozone.