SMA TAXIES OFF TAXIWAY DUE LIGHTING PROBLEM.

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VISUAL APCH LNDG DFW 35R; TAXIED OFF RWY NI; ASSIGNED 27 TO 'K'; N ON 'K' TO 18. REQUESTED PROGRESSIVE; UNFAMILIAR WITH ARPT. CTLR HANDLING BOTH AIR AND GND. ON TAXIWAY 'K' AGAIN REQUESTED PROGRESSIVE. NO BLUE TAXIWAY EDGE LIGHTING ON 'K' OR 18/19; CTRLINE LIGHTS ONLY. CTLR SAID; 'TAXIWAY AHEAD IN 18' BUT WHAT APPEARED TO BE A TAXIWAY WAS A PERIMETER ROAD. TAXIED OFF TAXIWAY N END; NO BLUE LIGHTS AND SOME OBSTRUCTION FLASHING LIGHTS AT A HOLE JUST OFF THE N END OF TAXIWAY 'K' WERE NOT LIT. TAXIED JUST OFF END OF TAXIWAY BEFORE ABLE TO STOP. NO DAMAGE; TOWED ACFT BACK ONTO TAXIWAY. TAXIED IN TO PARKING. HAD ACFT INSPECTED BEFORE NEXT FLT. CTRLINE TAXIWAY LIGHTING IS NOT ADEQUATE WITHOUT BLUE TAXIWAY EDGE LIGHTS. WHEN APCHING A TAXIWAY AT A 90 DEG ANGLE (L) CANNOT SEE ADJACENT TAXIWAY UNTIL ALMOST IN LINE WITH IT. CTLR APPARENTLY COULD NOT SE TAXIWAY EITHER; HENCE THE MISINFO. CALLBACK CONVERSATION WITH REPORTER REVEALED THE FOLLOWING: RPTR STATES CTRLINE LIGHTS ARE GREAT IF YOU SIT UP HIGH. BUT LOWER ACFT HAVE TO BE ALMOST ABEAM THE TURN OF LIGHTS TO SEE A 90 DEG CHANGE OF DIRECTION. THE AREA AT 19/18 IS A SOLID PAVED AREA SO AT NIGHT ONE CANNOT TELL WHERE TAXIWAY ACTUALLY TURNS. ADD TO THAT CTLR STATEMENT 'TAXIWAY AHEAD IS 18' SO RPTR LOOKED AHEAD; SAW DARK AREA AND TAXIED. HE FEELS THERE WILL PROBABLY BE NO ACTION DUE TO FLASHERS NOT BEING ON OR FLASHING. IF ACFT HAD BEEN A FOOT MORE TO THE SIDE IT WOULD HAVE BEEN DISASTROUS. AS IT WAS; NO DAMAGE. REALLY NEED BLUE EDGE LIGHTS!