Luminous paint or luminescent paint is paint that exhibits luminescence. He is also known for his work in luminescence and phosphorescence. A phosphor, most generally, is a substance that exhibits the phenomenon of luminescence. Tm ions exhibit a bright blue luminescence. Photon Counting is widely accepted as the most sensitive means of detecting luminescence. They may have luminescence and a distinctive absorption spectrum. A relatively new dating process, optically stimulated luminescence (OSL), is still in development. A precise microscopic description is provided by the semiconductor luminescence equations. The chemiluminscent substrate is cleaved by HRP, resulting in the production of luminescence. This heat-seeking ability is responsible for such diverse optical phenomena as Night-vision and IR luminescence. During sediment transport, exposure to sunlight 'zeros' the luminescence signal. A theoretical approach to handle this is given by the semiconductor luminescence equations. Several studies have shown the biochemical roles of the luminescence pathway. Other uses include applications in colorimetry, crystallography, luminescence and spectrophotometric analysis. UV to deep red luminescence can be achieved.