Mike Beede wrote:

From a standpoint of aviation, the biggest concern would be finding enough
red lights so you could put three of them at each hundred foot level, and hiring
enough guys to keep changing them. I make that 9.9 million bulbs.

Of course, they could change the lighting regulations, but if it only takes twenty
years to build the elevator, they might have to put them on anyway....

Our guvunmit radar balloons, don't have lights on their tethers...
They geaux up something like 15 to 25k'...