I'm sensing a little crane bashing going on.
Just how much communication and education is there between the aviation industry and the crane operators, and/or their representative bodies?
I would guess that the owners/operators of these cranes don't want things hitting them, down time costs money, repairs cost money. Not to mention the human cost we've seen here.
Adding & changing lighting shouldn't be a huge issue nor a major cost and relatively easy to achieve, could it be the operators have been believing that the odd low intensity light is sufficient as that is what they have been told (by regulators).
At what height point do temporary structures (i.e. cranes) start to be illuminated?
As in at what height on a structure do the lights start to be placed, not the height at which defines the requirement?