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Black Light UVB - 306 nm. UVB lamps emit ultraviolet rays between 280 nm and 360 nm (peak at 306 nm). The spectral distribution is suited to test ultraviolet resistance of paints, plastics, and rubbers. Also used as special light sources for inspection and analysis. Available sizes - G4T5UVB - 6", G6T5UVB - 9", G8T5UVB - 12", G15T8UVB - 18", G20T10UVB - 24", G25T8UVB - 36", G40T10UVB - 48"