diff --git a/doc/sefun/set_light b/doc/sefun/set_light
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+++ b/doc/sefun/set_light
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+SYNOPSIS:
+        int set_light(int n)
+
+DESCRIPTION:
+        An object is by default dark. It can be set to not dark by
+        calling set_light(1). The environment will then also get this
+        light. The returned value is the total number of lights in
+        this room. So if you call set_light(0) it will return the
+        light level of the current object.
+        
+        Note that the value of the argument is added to the light of
+        the current object.
+
+BUGS:
+	This handling of light by the parser is inappropriate for most
+	purposes: If you put a burning candle into a safe, the safe
+	will start to emit light.