Tatare
NOD should also have mentioned FUEL, or more importantly the lack of it when down to hover weight.
On cool/cold day it is less of a problem but a hot one a VL might not even be possible but whatever the situation the trick is to keep the decel period to a minimum, establish over the pad, get into a stable descent and land without running out of fuel first!
Flashing lights certainly concentrate the mind.....
MB