Photo 1 of (Pack of 4) 13 Watt Double Tube - G24Q-1 (4 PIN) Base - 4100K Cool White - CFL Light Bulb. Replaces Sylvania 20667 CF13DD/E/841 - Philips 38328-1 PL-C 13W/841/4P/ALTO and GE 97597 F13DBX/841/ECO4P

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Photo 1 of (Pack of 4) 13 Watt Double Tube - G24Q-1 (4 PIN) Base - 4100K Cool White - CFL Light Bulb. Replaces Sylvania 20667 CF13DD/E/841 - Philips 38328-1 PL-C 13W/841/4P/ALTO and GE 97597 F13DBX/841/ECO4PPhoto 2 of (Pack of 4) 13 Watt Double Tube - G24Q-1 (4 PIN) Base - 4100K Cool White - CFL Light Bulb. Replaces Sylvania 20667 CF13DD/E/841 - Philips 38328-1 PL-C 13W/841/4P/ALTO and GE 97597 F13DBX/841/ECO4P