Because the electronic clock rings every hour, we only need to consider which light to turn on. Turn on the light every 9 minutes from noon 12. How many 9 minutes does it take to get to the hour? Because 1 hour =60 minutes, in other words, the question is: how many times of 9 minutes is an integer multiple of 60 minutes? So the essence of the problem is clear: it is to find the least common multiple of 9 points and 60 points. It is not difficult to calculate that the least common multiple of 9 and 60 is 180. In other words, the electronic clock will ring and light up again after 180 minutes from noon, that is, after 3 hours.

12 hours +3 hours = 15 hours (3 pm)

A: The next time the light rings, it will be 3 pm.