PHOTOCHROMIC is validvalid

changing colour, and hence changing the amount of light transmitted when the incident light increases, or decreases / a photochromic material

172,750 of 196,601 in NWL2023·also valid in CSW24

changing colour, and hence changing the amount of light transmitted when the incident light increases, or decreases / a photochromic material

179,328 of 280,887 in CSW24·also valid in NWL2023

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