Date: 201908
Local time of day: 1801-2400
Location: LAS.Airport, NV
Flight conditions: VMC
Light: Night
Aircraft: Medium Transport; Low Wing; 2 Turbojet Eng
Operating under: Part 91
Flight plan: IFR
Mission: Passenger
Flight phase: Takeoff / Launch
ATC / advisory: Tower LAS
Reporter function: First Officer; Pilot Not Flying
Reporter qualification: Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Human factors: Confusion
Anomaly: Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Published Material / Policy; Ground Event / Encounter Other / Unknown
Detector: Person Flight Crew
When detected: Taxi
Result: Flight Crew Became Reoriented
Contributing factors: Airport; Environment - Non Weather Related
Primary problem: Airport

Narrative: We received clearance to taxi to 8L from [FBO] via F (H?). It is important to note it was dark; and approaching 8L the taxi lines and lighting became increasingly difficult to see/interpret although I was familiar yet annoyed at the lack of proper depiction. We were cleared into position. While I was occupied accomplishing the takeoff checklist; the PIC indicated his dissatisfaction with the taxi line clarity. I looked up and pointed out we had just passed the turn to enter 8L. He made the correction immediately without impacting 1L; which in the process of the correction the controller advised us of the potential; I replied we had mitigated. We positioned on 8L as instructed; and confirmed 8L correct. When; as in this case; the runway numbers are not visible per our instructions; I use the MFD at 250 feet setting to confirm our position and alignment with the runway as assigned. In fact I use this as a double check for each takeoff in addition to the SOP requirement. We were cleared for takeoff. At this point my job as PM [Pilot Monitoring] is to stay inside and monitor speeds; engine instruments and such. At V1 I noticed a taxiway alert but per SOP had already called V1. Nothing indicated the aircraft was un-flyable so I called rotate. No unusual sound; just what seemed like a false alert. Nothing unusual whatever was noted for remainder of the evening. The PIC did not fail to post flight; made note of nothing to myself; and my post flight found nothing. I do look for obvious damage in all cases but found none apparent. I had mulled asking this be written up; as the following day in LAS got a similar alert (different runway) upon takeoff; but my suspicion; if memory serves; was a deferred database issue. In any case wrong runway/taxiway alert are not uncommon at LAS which can be testified by any Aircraft X pilot who has loaded the RNAV approach to 19R for backup and flew it visually per ATC instructions. You will get it every time. The 8L/1L area is a known problem area. At night it is poorly marked; taxi lines are difficult to see; and adequate lighting is nonexistent. Green taxiway centerline lights are an absolute must; especially; again; as this is a known; published problem area. RCLM [Runway Center line Markings] are a must. It is inconceivable to not have this at night; especially as the runway numbers are 1000' down the runway. Night takeoffs from this runway should be prohibited until this is rectified.




Synopsis: Corporate First Officer reported issues with lighting; markings; and no runway identification for 8L/1L at LAS airport.