I've worked a lot with WS2812 LEDs, and managing 5v power lines is always a pain in the butt. I was intrigued by the possibility that I could run LEDs that are 12v, and thus cut my amperage in half. So far I've only played with these for about an hour - here were my experiences. When I plugged the LEDs in to 12 volt power - THEY STARTED RUNNING TEST PATTERNS! I hadn't even plugged in the arduino yet! The LEDs must contain a test pattern - which is really fascinating! So - then I hooked up an Arduino and ran some data into the LEDs. I used the FastLED library, and set it up like I was using WS2812 LEDs, and it just worked! (Which means it should work with a Teensy and an OctoWS2811 board) Then I ran a rainbow test... The 5v WS2813 LEDs pulled 0.41 amps. (2.05 watts) The 12v GS8208 LEDs pulled 0.24 amps. (2.88 watts) The GS8208 LEDs are a bit less efficient, and they also warmed up a little bit. They did pull less amperage though! Which is great for my requirements!