This Harmony spare incandescent bulb is fitted with BA9s base 2.4W. This spare incandescent bulb is a lighting accessory for Harmony illuminated push buttons. It is supplied 120V to 130V AC/DC. Its simple and modular design allows easy installation. It weighs 2g. It is compatible with Harmony XB4, XB5, XB7. It is sold in lots of 10.