Lutron H3D T540 G U 1 10 Dimmable (1) 40-Watt 3100-Lumens T5 Twin Tube Lamp High Frequency Electronic Fluorescent Ballast 120/240/277-Volt AC Hi-lume® 3D | HZ Electric Supply
Fluorescent dimming systems
Lutron H3D-T825-C-U-2-10 (2) 25-Watt Linear and U-Bent T8 Lamp High Frequency Fluorescent Ballast 120/240/277-Volt AC Hi-lume® 3D
Fluorescent Ballast,Dimmable,40W: Electrical Ballasts: Amazon.com: Tools & Home Improvement