Size of ballast EP-B006: L88¡ÁW73¡ÁH32mm Input Voltage: ¡Ý9V Rated Voltage: 13.5v Max Start Voltage: 23kv Max Input Current: 5.0-7.5A Output Power: 35w Working Temperature: -40¡ã¡« +105¡ã Power Efficiency : >83% Working Frequency:320HZ¡À5% lifetime of ballast:3500hours lifetime of xenon bulbs:over 2500hours