SAAB 340B CAPT RAN OVER A TXWY LIGHT AFTER LEAVING THE RWY DUE TO DARK MISTY NIGHT AND BRIGHT RAMP LIGHTS THAT DISTORTING THE SIZE AND DISTANCE OF TXWY LIGHTS. THE BLADES OF THE #2 PROP WERE DAMAGED.

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MY CAPT AND I FLEW AN UNEVENTFUL PRE-DAWN FLT FROM ALBANY; NY; TO BOS; MA. THE WX CONDITIONS WERE NEAR MINIMUMS. I RECALL VISIBILITY BEING BTWN RVR 2000 FT AND 3000 FT WITH A CEILING OF 100 FT. MY CAPT WAS THE PF. WE FLEW THE ILS RWY 4R APCH AND WERE STABILIZED; NOTHING WAS ABNORMAL. UPON TOUCHDOWN; WE SLOWED TO TAXI SPD. BOS TWR SAID THAT THE HIGH SPD TXWY Y IS AVAILABLE OR RWY 33L. I ASKED MY CAPT WHAT HE'D LIKE TO DO. HE SAID WE'LL TAKE RWY 33L. BY THIS POINT; I'D SAY WE WERE VIRTUALLY STOPPED ON THE RWY. I LOOKED TO MY L AND SAW RWY 33L ABEAM US TO THE L. NOTHING LOOKED TO ME LIKE WE COULDN'T MAKE THE TURN OK. IT WAS STILL DARK WITH LOW VISIBILITY AND MIST. I ALSO RECALL THE TXWY AND RWY LIGHTS BEING VERY BRIGHT WITH ILLUSIONS OF HALOS AROUND THEM. I COULD NOT SEE ANY PAVEMENT TO MY L BECAUSE OF THE DARKNESS. MY CAPT TURNED THE ACFT TO THE L TO EXIT THE RWY. WHEN I SEE WE HAVE EXITED THE ACTIVE RWY; I IMMEDIATELY BEGAN MY AFTER LNDG CHKLIST; SO MY EYES WERE INSIDE THE COCKPIT. WHILE REACHING FOR THE FLAP HANDLE; I HEARD A NOISE SIMILAR TO RUNNING OVER A RWY CTRLINE LIGHT; FOLLOWED BY A FEELING SIMILAR TO A BUMP IN THE ROAD. I IMMEDIATELY LOOKED OUTSIDE AND COULD ONLY THINK THAT WE STRUCK A TXWY OR RWY LIGHT WITH THE #2 ENG. I IMMEDIATELY NOTIFIED THE CAPT THAT I BELIEVE WE STRUCK A LIGHT. HE ASKED IF I SAW ANY DAMAGE AND I SAID FROM MY VIEW. I COULDN'T SEE ANY DAMAGE AT ALL. I ALSO DID NOT SEE SPARKS; FIRE; OR SMOKE. THE CAPT CHOSE TO CONTINUE THE TAXI AND INSPECT THE ACFT DURING THE POSTFLT INSPECTION. UPON INSPECTION; WE FOUND 1 PROP BLADE WITH A LAYER ON THE TIP ABOUT 2 1/2 INCHES GONE. 2 OTHER BLADES APPEARED TO BE SCRATCHED SLIGHTLY. NO OTHER DAMAGE WAS SEEN INCLUDING THE FUSELAGE; STRUTS; TIRES; OR ENG. THE CAPT IMMEDIATELY NOTIFIED MAINT AND WE SAW OUR CHIEF PLT. THE BOS TWR WAS NOTIFIED THAT THERE MAY BE A LIGHT OUT AT THE INTXN OF RWY 4R AND RWY 33L. MY CAPT LATER TOLD ME THAT HE SHOULD HAVE TAKEN THE HIGH SPD TXWY AND THAT IN HIS MIND HE MISJUDGED THE TURNOFF TO RWY 33L AND DIDN'T TURN AS SHARP AND HE SHOULD HAVE. HE SAID HE'D DONE THAT PROC MANY TIMES EXITING THE RWY AND TODAY; HE MAY HAVE JUST MISJUDGED THE TURN. I BELIEVE THE MAIN CONTRIBUTING FACTOR WAS THE WX. IT WAS DARK; MISTY AND FOGGY AND WITH THE BRIGHT LIGHTS CREATING AN ILLUSION OF A HALO; IT MAY HAVE MESSED WITH OUR DEPTH PERCEPTION. NO PAX KNEW WHAT HAPPENED AND NO INJURIES OCCURRED. THE CREW WAS VERY PROFESSIONAL AND IMMEDIATELY NOTIFIED THE PROPER PEOPLE AS TO WHAT HAPPENED.