This article was originally published on 21 August 2018.

The article has been updated.

The BBC has made the following changes to the article to reflect the current state of the article.

The original version of this article incorrectly said the Led Lights are not LED bulbs, they are not light bulbs and they are made by Philips.

The lead lamps are led light bulbs.

This article has also been amended to clarify that the Led lights do not work by dimming or turning on when the headlumbeasts are away from the camera.