Tables > Lighting > Ceiling Reflectance > Reflectance Values
Effective Ceiling Reflectance

 
% Ceiling or Floor Reflectance
90 80 70 50 30 10
% Wall Reflectance
90 70 50 30 80 70 50 30 70 50 30 70 50 30 65 50 30 10 50 30 10
Ceiling or Floor Cavity Ratio
0909090908080808070707050505030303030101010
.1908988877979787869696859494830302929101010
.289888685797877766867664948473029292810109
.389878583787775746866644947463029282710109
.488868381787674726765634846453029272611109
.588858178777573706664614846442928272511109
.6888480767775716865625947454329`28262511109
.788837874767470666561584744422928262411108
.887827773757369656460564743412927252311108
.98781767175726863635955464340292725221198
18680746974716661635853464239292724221198
1.18679736774716560625752464138292624211198
1.28678726573706458615650454137292623201297
1.38578706473696357615549454036292623201297
1.48577696272686255605448454035282622191297
1.58576686172686154595347443934282522181297
1.68575665971676053595245443933282521181297
1.78474655871665952585144443832282521171297
1.88473645670655850575043433732282521171296
1.98473635570655749574942433731282520161296
28372625369645648564841433730282420161296
2.18371615269635547564740433629282420161396
2.28370605168635445554639423629282419151396
2.38369595068625344544638423528282419151396
2.48268584867615243544537423527282419141396
2.58268574767615142534436413427272318141396
2.68267564666605041534335413426272318131395
2.78266554566604940524334413326272318131395
2.88166544466594839524233413325272318131395
2.98165534365584838514133403325272317121395
38164524265584738514032403224272217121385
3.18064514164574637504031403224272217121385
3.28063504064574536503930403123272216111385
3.38062493964564435493930393123272216111385
3.48062483863564434493829393122272216111385
3.57961483763554333483829393022262216111385
3.67960473662544233483728393021262115101385
3.77960463562544232483727383021262115101384
3.87959453562534131473627382921262115101384
3.97859453461534030473626382920262115101384
4785844336152403046352638292026211591384
4.1785743326052392946352537282026211491384
4.2785743326051392946342537281926201491384
4.3785642316051382845342537281926201491384
4.4775641305951382845342437271926201481384
4.5775541305950372745332437271925201481484
4.6775540295950372644332436271825201481484
4.7775440295849362644332336261825201381484
4.8765439285849362544322336261825191381484
4.9765338285849352544322336261825191371484
5765338275748352543322236261725191371484


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