Pixel led DMX Parallel controller comes in 2 varieties

1.  8 Port Data output (J2000)
2. 20 Port Data output 

Note:- 

For road ceiling, we recommend the J2000 controller, because the gap between 2 pixels led chain  is 4 to 5  foot some time  more than 5 foot

The main reason for my recommendation is because in the road ceiling when we connect 20 ports (P2000) types controller very long wires are needed for data connections

if we use 8 Port type (J2000) no need for very long wire and connections are easy to compare to 20 ports 

if you make a pixel ceiling where pixel led are installed at a small distance then you use 20 port type controller