The 6673 is listed for use with the dimmable compact fluorescent lamps shown below. It is not listed for use with 2-wire fluorescent ballasts such as the Advance Mark 10, Lutron TU-Wire, or the OSRAM SYLVANIA POWERSENSE.
Philips EL/A R30 DIM16W
Philips EL/A R40 DIM20W
Feit BPESL23T/DIM (23W)
Ecosmart ES5M10123 (23W) or Technical Consumer Products Model 10123
Ecosmart ES5R315DIM (15W) or Technical Consumer Products Model 2R3015DIM