The Lutron Nova T NTFTV-BL single pole fluorescent dimmer switch is a great component is for use with 0-10 volt dimming ballasts and is a great accessory to any lighting atmosphere. At 10 volts, the controlled lighting output is at 100%. This dimmer has a delightful slide-to-off feature, power failure memory, and heavy-duty components for surge protection and long product life, all while saving energy. CSA and UL listed with a 1-year warranty, this dimmer switch is a worthwhile addition to any commercial lighting scheme. *Note: For use with Lutron Eco-10 (TVE Series) 0-10VDC Electronic Dimming Ballasts only. Requires use of an external relay to switch ballast power on/off, Lutron PP-20 Power Packs or PP-120H/PP-277H.