Leviton has a companion switch for 3-way applications with LEDs (http://www.asihome.com/ASIshop/product_info.php?products_id=3346), and one without. The one with LEDs requires a 227VAC device - can anyone explain what that means? Would using the switch with LED require a more specific wiring setup or should it work in any situation where I'm replacing existing 3-way switches?