I imagine that they're low height pathway kinda lights, maybe part of 150 yd etc yardage poles. That would be my guess.
At a greenfee of circa £200 ea, or £800 for a fourball, plus add-ons, there must be quite an incentive to keep folks playing the course even when the haar rolls in, which is why I was wondering if any other courses adopt such an approach.
If it were TOC/Leuchars, Moray/Kinloss or Machrihanish though, it could be amusing what with the potential for some seriously large airborne friends to land!
atb