Lit ambient faucet.
Remove the top of a spigot, create a small-scale canyon, add backlighting and you’ve got ambient water fittings. That’s what Germany’s Hansa is doing with Hansacanyon, by adding LEDs that change color as a function of water temperature so you can see when it’s hot or cold. Also included; precise temperature control, for sinks, baths and showers.
Lit temperature controls.