If you do not like things that go bump in the night (namely other people) you might want to avoid "On Light," installations by Bruce Munro at Longwood Gardens in Kennett Square, Pennsylvania. However, if you want to see the fields and marshes transformed by bubbles, bottles, and blocks of plastic lit from within, you need to see Munro's first solo light exhibit outside of his native England.
Most of the paths are outlined by lanterns with candles inside, but they don't light your path--I had a tiny flashlight I used to give me a little confidence as to where my feet were going, but the circular path (and you don't really know that you are going to end up where you started) draws you through fields, across a (mosquito laden) pond, and through clearings scattered with globes and scrambles of light. It was really a relief to get back to the conservatory and the lily pond, which was more brightly illuminated. Even though it was late, there were lots of families with small children and strollers. I'd hate to have to keep track of a small child out in the fields, but the good and bad news is that there are lots of people all over the place, so it would be tough to get lost. Just follow the crowd. And at 9:15, we were treated to the famous lighted fountains, with background music of Ellington-type light jazz.
And in case you are wondering, that is a heron taking off towards a field of light the other side of a pond. Everyone was watching him as he stood like a statue not ten feet away from the path, and as I took the picture, he took off. I wonder what he thought he was heading towards in this unnatural scene!