EMB120 FLC TAKE OFF WITHOUT RWY LIGHTS.

Narrative

ON THE MORNING OF APR/TUE/01; I DEPARTED DOTHAN AS A PF FO OF A PART 121 CARRIER. AFTER DEP; THE CAPT AND I REALIZED THAT WE DID NOT KEY ON THE RWY LIGHTS. THE RWY WAS CLRLY VISIBLE THROUGHOUT THE TKOF ROLL. HOWEVER; WE REALIZE THAT THE FARS REQUIRE RWY LIGHTING. I WAS FATIGUED FROM COMPLETING 3 CONTINUOUS DUTY OVERNIGHTS; EACH ALLOWING ABOUT 5 1/2 HRS OF SLEEP. THE CAPT WAS ALSO FATIGUED; AS THIS WAS HIS SECOND CONTINUOUS DUTY OVERNIGHT. ADDITIONALLY; I WAS HEAD DOWN IN THE COCKPIT FOR MOST OF THE TAXI PERFORMING MY FIRST FLT OF THE DAY CHKS. THUS I DID NOT NOTICE THIS DURING TAXIING. IN THE FUTURE; I WILL ALWAYS KEY UP THE LIGHTS BEFORE MAKING THE FIRST RADIO CALL AND ALSO KEY A SECOND TIME AS WE ARE TAKING THE RWY FOR DEP TO PREVENT THEM FROM EXTINGUISHING DURING THE TKOF ROLL. I WOULD LIKE TO REITERATE THE HAZARDS CREATED BY FATIGUE. CONTINUOUS DUTY OVERNIGHTS ALLOW A PLT TO FLY WITH ANY SLEEP THE PLT CAN GET; BE IT 1 HR OR 6 HRS. THESE CONTINUOUS DUTY OVERNIGHTS ARE NOT DESIGNED WITH ANY SAFETY IN MIND; THEY ARE SOLELY DESIGNED TO MEET A SCHEDULE.