This flashbar, aka blinder, was used under a concert to give a blinding effect for the audience.

A mosfet driver is enabling the LED’s. The LED’s is 10W element, and there is 8 elements on the flashbar giving 80W of power.
It’s powered from an PC power supply.

The ESP8226 is running a small UDP server and listens for sACN packets. sACN is like DMX512, but over UDP instead of RS-485.
You can find the firmware here https://github.com/TimGremalm/FlashBar.

The LED’s are screwed down on top of a steel bar to transfer the heat.