I watched a taxi beside a marshaller, and had the 'luck' to SEE
an aircraft taxi in with his NOSE Taxi light and the Runway Turn-off lights ON. The marshaller complained and I said, make him to stop. He did, the aircraft stopped, we covered our eyes (signalling the Capt), he turned his nose lights off. A minute to recuperate and all was safe. Capt apologised to the marshaller (good CRM).
Now, what about leaving the Runway turnoff lights ON, and switching the Nose Taxi light OFF, while entering the bay until engine shutdown? It does help illuminate the side-lanes on a 'darkish' ramp, and keep ground handling vehicles away.
These days, most 'modern' and 3rd world airports have 'electronic marshalling', but yes, it does hurt the eyes, more than a 'high beam' on the road.