American Society for Testing and Materials (ASTM). Current edition approved Nov. 15, 2006. Published April 2007. Originally approved in 1997. Last previous edition approved in 2000 as G 151 – 00. 15 p. This practice provides general procedures to be used when exposing nonmetallic materials in accelerated test devices that use laboratory light sources. Detailed information regarding procedures to be used for specific devices are found in standards describing the particular device being used. For example, detailed information covering exposures in devices that use open flame carbon arc, enclosed carbon arc, xenon arc and fluorescent UV light source are found in Practices G 152, G 153, and G 154, and G 154 respectively.