Step 1: Prep
I put a small hole in the wall and strung the LED strip wire from below with a wire coat hanger. I used the access hole where the sink drain pipe goes into the wall to feed the wire into.
Step 2: Glue It Up
Using your notched trowel spread the tile adhesive. Center the LED strip (trust me, much easier to do this before you glue the tiles up!)
Put the glass tiles up on top of the LED strip.
Step 3: Check It Out!
Now that the tiles are up, attach your battery or transformer to the LED strip and watch the show. I used an LED strip that cycles colours, but if I were to do it again I'd have the LED strip go the entire length across and have white or warm white LEDs.