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Lutron Electronics H3DT540GU210 40 W 277 VAC 2-Lamp T5 High Frequency Fluorescent Dimming Ballast | Crawford Electric Supply
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Lutron Studded Dimming Ballast 120V to 277V for (1) T4 26W or 32W 4 Pin CFL Bulb | EC3DT4MWKU1S | Bulbs.com
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