How can it be wrong to have the landing light on at the hold.
In 300odd hours of night flying i have always had the landing light on at the hold, it is all to easy not to notice the aircraft creeping forward because the brake has not been applied sufficiently by student. Next thing prop smacks a taxi light.
Even when on final i always found the airfield apron flood lights more of a distraction especially when chucking down with rain than the aircraft holding.
To get a point over demonstrate what happens if a particular procedure is not followed.
Have had many a Pa28 pilot, let alone student have simulated engine failure due to the elec. pump not being switched on!