LEDs are LEDs now (defined as light_source)

init.lua

@@ -69,6 +69,7 @@ for id = 1, ledCount do
         core.register_node("ledtree:led" .. id .. "_" .. texture, {
             description = "LED" .. id .." " .. texture,
             tiles = {texture .. ".png",},
+            light_source = 10,
             on_rightclick = function(pos, node, player, itemstack, pointed_thing)
                 change_color(player, id, pos)
             end,