BW1 Waterproof NDT inspection light suitable for MPI inspection above and below water. The light contains an intense blue 3W LED light and a white LED light, which can be switched between; this means only one light source needs to be carried. The blue LED excites fluorescence in the inspection material making it visible under low light conditions. The LED is robust and long lasting and not subject to stoppage caused by minor knocks. It has instant on/off and low power consumption. BW-1 is supplied complete with a yellow “blue block” filter visor which fits over a face mask. This filters out the stray blue light and slightly darkens the ambient light; making underwater MPI possible in daylight conditions. BW-1 can be used in conjunction with UW1 underwater MPI inspection media.