We produce these electrode-less lamps in versions that allow them to be safely submerged directly underwater.  By doing so it brings a broad spectrum of light to both fresh and salt water plants which can significantly improve plant and coral growth over lamps that light from above the water or require waterproof housings which can reduce intensities and change the spectral distribution of the lamp.  We also have versions of these lamps that can be used to sterilize water or air based on their ability to produce UVc and ozone.  Contact us with your specific needs and we would be happy to discuss how these products can be used in your application.