FLC OF ACR LTT ACFT INADVERTENTLY TURNED OFF ON CLOSED TXWY AFTER LNDG DUE TO HURRY IN CLRING THE RWY FOR LNDG TFC AND UNLIGHTED SIGNS TO IDENT THE PROPER TXWY.

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LNDG AT PHL AT NIGHT; WE WERE CLRED TO LAND RWY 9R AND WERE ADVISED BY TWR THAT ONLY FF; GG; AND THE LAST TXWY WERE AVAILABLE DUE TO SNOW. UPON LNDG WE HAD PROBS READING THE TXWY SIGNS BECAUSE THEY WERE NOT LIGHTED. THE TWR ASKED US IF WE WERE GOING TO CLR THE RWY BECAUSE AN ACFT WAS ON 1/2 MI FINAL BEHIND US; AND WE WERE HESITATING. THE COPLT SAID YES WE WERE CLRING WHEN ACTUALLY HE SHOULD HAVE VERIFIED THE TXWY WAS GG OR FF. I FELT PRESSURED TO TURN OFF THE TXWY WE THOUGHT WAS FF BUT WAS ACTUALLY CC. THERE WAS NO PROB ON CC OTHER THAN A SMALL RIDGE OF SNOW FROM PLOWING WHICH I CROSSED OVER WITHOUT PROB. IN THE FUTURE IF I AM NOT SURE OF A TXWY I WILL INFORM THE TWR AND IF NECESSARY LET THE ACFT BEHIND ME GAR. IT ALSO WOULD HELP IF ARPTS COULD KEEP THEIR TXWY SIGNS LIGHTED. I AM A 6 YR COMMUTER PLT AND DEAL WITH PHL EVERY WK IT'S EASY TO FALL INTO THE PRESSURE OF TRYING TO HELP THE TWR IF ABLE. AND NOBODY WANTS TO MAKE THE ACFT BEHIND THEM GAR; BUT IN THIS CASE IT WOULD HAVE BEEN THE BEST DECISION.