void switchLamp(Block b, boolean lighting) throws Exception {
        World w = (World) ((CraftWorld) b.getWorld()).getHandle();
        if (lighting) {
            setWorldStatic(w, true);
            b.setType(Material.REDSTONE_LAMP_ON);
            setWorldStatic(w, false);
        } else {
            b.setType(Material.REDSTONE_LAMP_OFF);
        }
    }

    private static void setWorldStatic(World world, boolean static_boolean) throws Exception {
        Field static_field = World.class.getDeclaredField("isClientSide");

        static_field.setAccessible(true);
        static_field.set(world, Boolean.valueOf(static_boolean));
    }