diff --git a/korman/exporter/rtlight.py b/korman/exporter/rtlight.py
index 72dd35c..061abb0 100644
--- a/korman/exporter/rtlight.py
+++ b/korman/exporter/rtlight.py
@@ -198,7 +198,7 @@ class LightConverter:
             xlate = _BL2PL[bl_light.type]
             return self.mgr.find_create_key(xlate, bl=bo, so=so)
         except LookupError:
-            raise BlenderOptionNotSupported("Object ('{}') lamp type '{}'".format(bo.name, bl_light.type))
+            raise BlenderOptionNotSupportedError("Object ('{}') lamp type '{}'".format(bo.name, bl_light.type))
 
     def _is_projection_lamp(self, bl_light):
         for tex in bl_light.texture_slots: