No. I think it's sunset
No park has a closing time at 5pm.
The official open hours are when the booth is manned, but people are there at all times....nights with a full moon are particularly stunning.
I might be wrong but I think you can. The closing time is simply when staff isn't on the premises. I've seen signs stating that if you get there after, please place parking/entrance fee in a box. I do caution however that you do watch your step after sundown.
If you wanted to do night photography, you may have to have permission from the people who run the lighthouse.
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