In reply to Simon Pelly:
It's kind of alright to climb on suspension bridge buttress at night, but anything under a bulge or in a break will be in a dark shadow, so maybe a torch isn't a bad plan. This might make a lot of the stuff on the central section harder (as the cruxes are all at the level of the black bulge, (though it's the holds above it that you're after) and gear can go in horizontal breaks) but all the stuff between SB arete and Baby Duck should be doable, and Heironymous would possibly go too, but that's adventurous as it is. That Pandemonium Wall might be a thought as well.
The other night crag is the `one bolt/peg' stuff around Enchanted Gordon, right under a street light.