--- ray/src/px/x11image.c	1990/12/21 17:20:11	1.12
+++ ray/src/px/x11image.c	1991/03/18 09:35:06	1.13
@@ -411,7 +411,7 @@ XKeyPressedEvent  *ekey;
 			sprintf(buf, "%.3f", intens(cval)/exposure);
 			break;
 		case 'l':				/* luminance */
-			sprintf(buf, "%.0fn", bright(cval)*683.0/exposure);
+			sprintf(buf, "%.0fn", luminance(cval)/exposure);
 			break;
 		case 'c':				/* color */
 			comp = pow(2.0, (double)scale);