POTENTIAL CONFLICT BTWN 2 VFR DEPS FROM A NON TWR ARPT DURING A NIGHT OP AT ENW; WI.

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I WAS DEPARTING ENW AFTER TWR WAS CLOSED. ATIS WAS RPTING 'TWR IS CLOSED; RPT ALL MOVEMENTS ON CTAF 118.6; MILWAUKEE DEP IS MONITORING TWR FREQ' OR WORDS TO THAT EFFECT. I COULD HEAR DEP'S XMISSIONS. I CLICKED ON THE LIGHTS USING PLT CTLED LIGHTING; ANNOUNCED TAXI TO RWY 32 ON CTAF. NO RESPONSE OR COMMENT WAS HEARD. AFTER RUN-UP; I ANNOUNCED 'KENOSHA TFC; CARDINAL XYZ DEPARTING RWY 32; SW DEP.' NO RESPONSE HEARD. DEPARTED NORMALLY. I WAS AWARE OF A HEIGHTENED SENSE OF AWARENESS FOR CONFLICTING TFC AS THERE ARE MANY RWYS AT ENW AND WINDS WERE LIGHT. AT ABOUT 50 FT I NOTICED THE LIGHTS OF A VEHICLE ON THE TXWY AT THE DEP END OF RWY 6L; POINTED AWAY FROM ME. THE DEP END OF RWY 6L IS NOT VISIBLE FROM THE DEP END OF RWY 32 OR FOR SOME DISTANCE UP THE RWY. THE TWR AND TERRAIN ARE IN BTWN. AS I CROSSED THE INTXN OF RWY 32 AND RWY 6L; ON RWY HDG (320 DEGS) I SAW THE LIGHTS PULL ONTO THE RWY AND IMMEDIATELY ACCELERATE. IT WAS CLR AT THAT POINT THAT IT WAS AN ACFT. I TURNED TO A HDG OF APPROX 270 DEGS; OBSERVED THAT IT WAS A SMALL JET AND WATCHED IT DEPART. HE PASSED THROUGH MY ALT; HEADED THE OPPOSITE DIRECTION; BEFORE I HAD PASSED THE ARPT BOUNDARY. ON THE CTAF; I HEARD DEP TALKING TO THE LEAR 31 AS A DEP FROM KENOSHA WITH A POS MATCHING THAT OF THE JET I WATCHED DEPART. AT NO TIME DID I HEAR ANYONE BUT DEP ON TWR FREQ.