import bpy
from bpy.props import *
from bpy.types import Menu, Panel

class TLM_PT_WorldMenu(bpy.types.Panel):
    bl_label = "The Lightmapper"
    bl_space_type = "PROPERTIES"
    bl_region_type = "WINDOW"
    bl_context = "world"
    bl_options = {'DEFAULT_CLOSED'}

    def draw(self, context):
        layout = self.layout
        scene = context.scene
        obj = bpy.context.object
        layout.use_property_split = True
        layout.use_property_decorate = False