Lutron Electronic Dimming Ballast 120V to 277V For (3) T8 & U-Bent 32W Hi Lume 3D | H3DT832GU310 | Bulbs.com
Electrical ballast - Wikipedia
How to fix a fluorescent light that flickers or won't light: Fluorescent Light Repairs - fix flickering, dim, humming, buzzing, or dead fluorescent lights