Art return is one of 2 weather-based missions(the other is A wet affair), and if you check the video below, you also notice the thunder effect, with a light.
If you are a curious mapmaker looking to improve your weather, this guide will be helpful.

This is the stock script used for Art return. It provides the basic framework.

This body is used to house the voxbox and the light, and has the "thunder" tag needed by the script.

This is the item moved by the script and for some reason, houses the light(It didn't seem to work with other setups).

This is the part visible in the game, and flashes from time to time. Make sure to use a high value(I used 5000) for the "scale" parameter.

To make it look better, set up the environment. These are the settings I use, but you can tweak them.