It's not approach lights, it's standard lights used by emergency (EMERCOM) for working in the dark.
These are the same pictures and the same comment from a Russian
blog discussed here before.
Maybe the standard EMERCOM lights (obviously portable)
have been put on the poles remaining from the former ALS,
now defunct and non-operational since years (looking on their condition),
but certainly not an ALS system available at the moment of the Tu-154 landing.
Maybe they took these portable lights to create a make-shift "ALS"
for the Ministry of Emergency Situations aircraft landing there in the
night after the accident.
The lamps are without doubt directed to the sky.