Shy
Wouldn't he have time to switch on the night sun if doing a auto to unknown area
Md
A pilot qualified on type may be able to comment more reliably on the likelihood of its availability on this occasion and I don't fly the EC135.
However, from experience of Nightsun on other types I have flown, it may well not be available in an unpowered descent because it has a very high electrical load, i.e. it needs at least one generator to be on line, possibly both, depending on how the aircraft is wired.