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Sylvania FT40DL/841/RS/ECO 40W T5 Long Twin Tube Compact Fluorescent 4100K 82 CRI 4-Pin 2G11 Plug-In Base Bulb (20586) nostock Advance ICN2S40N35I Rapid Start FluorescentSylvania FT40DL 841 RS ECO 40W T5 Long Twin Tube Compact Fluorescent 4100K 82 CRI 4 Pin 2G11 Plug In Base Bulb (20586)