This product provides 24 hour lighting control for up to a 1000 watt ballast from a 240 Volt outlet. The Apollo 5 is compatible with all 240 Volt ballasts that feature a Smart Volt power cord. This includes: Sun System 1, 6 & 10, Harvest Pro, Harvest Pro Elite, Budget Gro, Galaxy and Lumatek ballasts. This timer makes lighting control simple!