Photo 1 of (4 Pack) 13 Watt Double Tube – 2 Pin (GX23-2) Base - 4100K CFL-Plug-in Replacement for Sylvania 21120/20708 - CF13DD/841/ECO - GE 97589 - F13DBX23/841/ECO - Philips 383133 PL-C13W/41/USA/ALTO.

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Photo 1 of (4 Pack) 13 Watt Double Tube – 2 Pin (GX23-2) Base - 4100K CFL-Plug-in Replacement for Sylvania 21120/20708 - CF13DD/841/ECO - GE 97589 - F13DBX23/841/ECO - Philips 383133 PL-C13W/41/USA/ALTO.Photo 2 of (4 Pack) 13 Watt Double Tube – 2 Pin (GX23-2) Base - 4100K CFL-Plug-in Replacement for Sylvania 21120/20708 - CF13DD/841/ECO - GE 97589 - F13DBX23/841/ECO - Philips 383133 PL-C13W/41/USA/ALTO.