Lutron EC3DT4MWKU1S Dimming Ballast, T4 4 Pin, 120-277V, 1 ...
https://www.amazon.com/Lutron-EC3DT4MWKU1S-Dimming-Ballast-120-277V/dp/B006UTRBWU
Lutron EC3DT4MWKU1S Dimming Ballast, T4 4 Pin, 120-277V, 1 Lamp - Electrical Ballasts - Amazon.com
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