Question:
Combined light and sound signal (thunder-light) consisting of 3 single signals which are fired at intervals of approximately one minute (day signal).
Author: Sophie March![combined light and sound signal (thunder-light) consisting of 3 single signals which are fired at intervals of approximately one minute (day signal).](https://markdown.memory.com/eq_uploads/by_url/main/1062508/resized_from_url_522845a9-4801-4130-a49f-d430193f62d0.jpg)
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