--- ray/doc/man/man1/pcomb.1	2003/04/07 15:43:08	1.2
+++ ray/doc/man/man1/pcomb.1	2003/10/21 15:08:19	1.3
@@ -85,7 +85,11 @@ The constant
 gives the number of input files present,
 and
 .I WE
-gives the white efficacy (lumens/brightness) for pixel values.
+gives the white efficacy (lumens/brightness) for pixel values,
+which may be used with the
+.I \-o
+option or the le(n) values to convert to absolute
+photometric units (see below).
 The variables
 .I x
 and