Which is the biggest challenge on product photography I have faced lately?

Probably the most complicated product photography project I have done so far.
The product is a humidifier with essence oil with 7 different LED lights. The client briefing states very clear: the mist and the LED light must be visible as sharp as the product "humidifier" itself.

Once I read: "If you face a challenge, always give it try and you will figure out how to make it happen along the way". I am not sure if that will apply to all the cases but definitively to this product photography project.

How did I make it happen?

1. Shot illuminating the humidifier itself.
2. Shot in a dark environment in order to capture the mist + Led light.
3. Composite both images in photoshop