Me & the mrs made this while on holiday last week.
The led is a 10w 36v module, the chip is an attiny85, and the 'house is alder and ash.
The light can either be sequenced or constant with dim function.
The 'house is powered from 5v Usb, I tried a simple 2 component fet & choke step up regulator circuit for the 36v led, pwm comes from the Attiny, it works.