Yamaha has teamed up with lighting experts Koizumi to create these home theater speakers with built-in lighting. Each unit has three 25W halogen lamps that are remote control-dimmable down to 20% brightness, designed to reduce the contrast between your TV picture and the wall behind to “ease the burden on your eyes.” So, a kind of one-color, non-reactive ambilight then, but the effect they produce is pretty subtle and saves you from installing moodlighting.
https://gizmodo.com/torn-disguised-lighting-looks-like-slits-into-parallel-5014912
The 47-inch high units have a 70Hz – 35kHz response, and will cost around $1,250, but there’s no info on availability. [Yamaha and Akihabaranews]