diff --git a/doc/sphinx/man/sefun/set_light b/doc/sphinx/man/sefun/set_light
new file mode 100644
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+++ b/doc/sphinx/man/sefun/set_light
@@ -0,0 +1,32 @@
+
+set_light()
+***********
+
+
+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.