An event like this is admirable and we should do things like this more often, manbe once a month or couple of weeks. How about we doing the same, although Japan isn't yet going to participate in this event, according to this article.
These experimental events have been held serveral times around the world, although I haven't heard the news like this in Japan.
Taking into account time difference of 15hours (14hours if Chicago is in summer time), if we are to participate this experiment, the light off time will be 5 o'clock in the morning. Most of the people are not yet awake. Or should we ignore the time differences?
admirable : 立派な、賞賛に値する take into account - : ～を考慮して time difference : 時差