Around the world on March 30, lights dimmed at 8:30 p.m. local time for #EarthHour. Here are before-and-after shots of our corner of the planet at JPL in California. #Connect2Earthpic.twitter.com/47tRvRIwWM
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were the same settings used for both shots?
Yes. 
The same camera, lenses and exposure settings were used for both the before and after shots. They were also both post-processed with the same settings and output. The only variable in terms of the image was the weather.
