On the left side of Left Hand is Kiss the Barney Stone/Gilded Lily. On the right side is T-Rect followed by Triceratops. There is one line bolted in between.. so I did that line thinking it was Dark Days. The description "The farthest line of bolts on the Left Hand Rock." isn't helpful since T-Rect and Triceratops were added after the description.
Anyway, I'm pretty sure the line I did was not Dark Days because it felt about 5.1 or 5.2 and certainly not 5.8. I'm assuming the line of bolts I climbed was to perhaps give easy access to the top anchors for people looking to set up top ropes...
"Dark Days" is the "deep chimney system in the middle of the wall", as per Bernard G.'s The Climber's Guide to Rocky Mountain National Park (2001) page 228. I have also removed the name "Kiss the Barney Stone" and - with Bernard's permission - identified the sport route as "Gilded Lily (retrobolted)".