... coefficient: NRC 0.4-0.6 depending on the pattern and the thickness 8. Light reflectivity: >=85% 9. Installation: match ... with ceiling t-grids 10. Packing Type: inner is carton and outer is shrink film 11. Payment terms: T/T ... office, theater, dining room, classroom, shopping center, Machine room, airport, fitness center library, swimming pool, living room, bedroom,Subway platform, passageway, etc.