Nosy Neighbor: Why was the Tribute in Light on for two extra nights?

N. wrote: “I am so confused. Today is the 12th? Did someone forget to flip the switch this morning?”

And the lights were on again last night, Sept. 13.

From the press office at the 9/11 Memorial and Museum, which manages the Tribute in Light: “The lights were on last night, and will be on again tonight, as we complete an exploratory exercise that is looking to the ensure long term sustainability of the lights.”

There you have it! Photos from N, above and below,  on the 12th and 13th, with an extra from J. at the bottom from the 11th.