Xiaohui has a cute electronic alarm clock. The colored lights on the alarm clock will flash once every 12 minutes, and the alarm clock will ring once every 30 minutes. At 15:00, Xiaohui found that the colored lights were flashing at the same time as the alarm clock was ringing, so when will the next time the colored lights flash and the bell ring at the same time?
小慧有一个可爱的电子闹钟，闹钟上的彩灯每12分钟就会闪一次，同时闹钟每30分钟也会响一次铃．15时整小慧发现闹钟响的同时彩灯也在闪，那么下一次彩灯闪和响铃同时发生是在几时？
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