diff --git a/init.lua b/init.lua
index 214b7a9..0d527ab 100644
--- a/init.lua
+++ b/init.lua
@@ -39,6 +39,8 @@ January 2017 -- rewritten a bit more by Vanessa E. to use engine param2 coloriza
 stainedglass = {}
 stainedglass.old_static_nodes = {}
 
+local myglow = LIGHT_MAX-3
+
 minetest.register_node("stained_glass:stained_glass", {
 	description = "Stained Glass",
 	drawtype = "glasslike",