PLT OF AN SMT SEL TURBOPROP ACR ACFT INADVERTENTLY TAXIED INTO A TXWY LIGHT RESULTING IN DAMAGE TO THE PROP AND TERMINATING THE FLT.

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XA08Z CALLED GND CTL. REQUESTED TAXI TO RWY 19R. WAS TOLD THAT DUE TO TFC I WOULD HAVE TO USE RWY 1L TONIGHT. TAXI TO RWY 1L VIA TXWY A. XA12Z SBOUND ON TXWY A; ALMOST ABEAM A-8 HIGHSPD TAXI FOR RWY 19R (REVERSE HIGHSPD FOR RWY 1L). GND: 'IF YOU CAN TAKE AN INTXN DEP TURN AT THE NEXT TXWY AND CALL TWR IMMEDIATELY -- THEY WANT TO TRY TO GET YOU OUT BEFORE AN ARR ON A 5 MI FINAL.' THEY HAD PREVIOUSLY INDICATED THAT THERE WAS SUBSTANTIAL TFC IN LINE FOR RWY 1L (LNDG TFC). XA13Z I SAW: THE TXWY WIDENED; AN APPARENT BREAK IN THE TXWY LIGHTS; THE A-8 TXWY SIGN. DUE IN PART TO RESIDUAL DEW AND MIST ON THE WINDSHIELD (ESPECIALLY NEAR THE CTR SPAR); AND OTHER SUPPORTING VISUAL CUES; I 'SAW' WHAT I WAS LOOKING FOR; THE TURNOFF FOR A-8. WHEN I SAW GRASS AHEAD OF ME IN THE BEAM OF MY TAXI LIGHT; I IMMEDIATELY STARTED A TURN BACK TO THE L (TO THE CTR OF TXWY A). I NEVER SAW THE LIGHT PRIOR TO IMPACT. I IMMEDIATELY TOLD GND CTL THAT I WOULD BE TAXIING BACK TO THE RAMP. XA15Z WHILE TAXIING IN; CALLED RAMP TO REQUEST A MARSHALLER AND INDICATED THAT I WOULD NOT BE ABLE TO FLY TONIGHT.