diff --git a/panda/src/pgraph/lightAttrib.I b/panda/src/pgraph/lightAttrib.I
index c78b6322d0..7bac28c836 100644
--- a/panda/src/pgraph/lightAttrib.I
+++ b/panda/src/pgraph/lightAttrib.I
@@ -65,6 +65,37 @@ get_light(int n) const {
   return _lights[n];
 }
 
+////////////////////////////////////////////////////////////////////
+//     Function: LightAttrib::add_light
+//       Access: Published
+//  Description: Returns a new LightAttrib, just like this one, but
+//               with the indicated light added to the list of lights.
+////////////////////////////////////////////////////////////////////
+INLINE CPT(RenderAttrib) LightAttrib::
+add_light(Light *light) const {
+  if (_operation == O_remove) {  
+    return compose(make(O_remove, light));
+  } else {
+    return compose(make(O_add, light));
+  }
+}
+
+////////////////////////////////////////////////////////////////////
+//     Function: LightAttrib::remove_light
+//       Access: Published
+//  Description: Returns a new LightAttrib, just like this one, but
+//               with the indicated light removed from the list of
+//               lights.
+////////////////////////////////////////////////////////////////////
+INLINE CPT(RenderAttrib) LightAttrib::
+remove_light(Light *light) const {
+  if (_operation == O_remove) {  
+    return compose(make(O_add, light));
+  } else {
+    return compose(make(O_remove, light));
+  }
+}
+
 ////////////////////////////////////////////////////////////////////
 //     Function: LightAttrib::is_identity
 //       Access: Published
diff --git a/panda/src/pgraph/lightAttrib.h b/panda/src/pgraph/lightAttrib.h
index be556eb22c..280aa7056e 100644
--- a/panda/src/pgraph/lightAttrib.h
+++ b/panda/src/pgraph/lightAttrib.h
@@ -61,6 +61,9 @@ PUBLISHED:
   INLINE Light *get_light(int n) const;
   bool has_light(Light *light) const;
 
+  INLINE CPT(RenderAttrib) add_light(Light *light) const;
+  INLINE CPT(RenderAttrib) remove_light(Light *light) const;
+
   INLINE bool is_identity() const;
   INLINE bool is_all_off() const;