Haha... I think thats a stretch.
I mean... its a cool feature, but I feel very confident that you'll have an issue finding anything that suggests its actually good for the coral, esp given the domestic nature of most corals in our tanks (aquacultured, fragged from another tank, etc.).
I reserve the right to be completely proven wrong by someone on here, but I would imagine that the greatest benefit or effect of a thunderstorm is the rain and disruption of the ocean waves... not the light.