You will need to use all the geocaching Gifts that are at your disposal (page source/high light the cache page) are just some of the ideas in order to find the solution but could lead you down a rabbit hole. Don't go Beyond your ability trying to figure this puzzle out but if all else fails there's always a life line. Some of the old Dinosaur cachers will probably figure it out pretty quickly. Have fun and good luck!!
The attributes show this is not a 24/7 cache, which it really is. The only problem at night is replacing the cache due to visablity. Your choice but read the hint. You wil need a 18' pole.