This test method is applicable to materials employed in light diffusers and lenses.The testing procedure described herein is intended to assess the propensity of material employed in light diffusers and lenses to fall from its installed position before igniting when subjected to test fire exposure conditions in CAN/ULC-S102, as required in the National Building Code of Canada 2005, Volume 1, Clause 3.1.13.4 1 (b).