Here’s something new and innovative. Shower drains with LEDs. Illumination is possible for both standard and custom shower channels. The illumination is based on simple circuit completion: as sufficient water runs over the LED light packs the circuit connects the contacts of the LED light modules and the lights turn on. When the water stops running the illumination switches off.
Practical? hmmmmm……..Allowing a daily showering duration of 15 minutes, batteries would need to be recharged after approx. three months.