So I've used this: 
2.4A per slot, 7.2A max and it works fine as the only device plugged in.
The "problem" occurs with this: 
2.4A per slot, 12A max but with 6 other devices plugged in, including one gopro as my webcam.
Once I tested the LEDs on the 10 slot as the sole device it works fine, so I guess there's not enough Ampere to go around any longer, given that my setup should be using a minimum of 1.6A in LEDs alone.
So thanks again, that was helpful to figure out. It might even help me back home with another USB related issue, possibly!