PLT OF A CPR TWIN TURBOPROP CUT SHORT HIS TURN WHEN TURNING OFF RWY AFTER LNDG CAUSING A PROP STRIKE OF THE L PROP ON A TXWY LIGHT RESULTING IN DAMAGE TO THE ACFT PROP AND TXWY LIGHT.

Narrative

AFTER TOUCHDOWN I WAS INFORMED THAT A B737 WAS BEHIND ME ON A 1 1/2 MI FINAL AND WAS ASKED TO EXPEDITE OFF THE RWY AT TXWY S4. THIS TXWY REQUIRED A SHARP L TURN SINCE IT WAS A REVERSED ANGLE HIGH SPD TURN OFF. IT WAS VERY DIFFICULT TO SEE THE FADED PAINT LINES WHICH MARKS THE TAXI LANE ENTRANCE AND I CUT THE CORNER TOO SHARP. EVEN THOUGH I WAS BEING CAREFUL TO STAY ON THE PAVED ASPHALT AS I MADE THE TURN; I DID NOT NOTICE THERE WERE SOME TAXI LIGHTS POSITIONED ON THE HARD SURFACE AREA. I HAD FORGOTTEN THAT ALL TAXI LIGHTS ARE NOT ALWAYS POSITIONED IN THE GRASS AREAS. THE L PROP STRUCK A BLUE TAXI LIGHT PUTTING A 1/4 INCH DEEP NICK IN 1 PROP BLADE WHILE THE OTHER 3 PROP BLADES RECEIVED SEVERAL SMALL DENTS RESEMBLING STONE NICKS. CONTRIBUTING FACTORS: WHEN THE ASPHALT SURFACES ARE WET; THE PAINTED LINES ARE VERY HARD TO SEE. DTW NEEDS TO USE REFLECTIVE PAINTS. ALSO BEING RUSHED TO MAKE A TURN ONTO A REVERSED ANGLE HIGH SPD TXWY IS TRICKY AND SHOULD NOT BE RUSHED. PERCEPTIONS -- JUDGEMENTS -- HUMAN FACTORS: AT THE TIME OF THE INCIDENT MY PLT DUTY TIME WAS AT 13 HRS WITH A DAY'S TOTAL OF 6 FLT HRS INCLUDING 4 INST APCHS. FATIGUE WAS A DEFINITE FACTOR; WITH THIS SINGLE PLT SIT. FOLLOWING THE STRIKE: ACFT WAS GROUNDED; AND A NEW PROP (OVERHAULED UNIT) WAS INSTALLED BEFORE FURTHER FLTS.