This is only my first year dealing with pixels and I have read everything I can and I have my display running at this point with no problems. I am running the show from a raspberry Pi, from there through a network switch to 2 separate f16v2 controllers. The first one sits near the controller, the second one is out the front under the mega tree. I then use the dmx outputs on these 2 controllers to run all the dumb strips. and the pixels are all run from these obviously. Now I read somewhere that cat5 cable would give you a longer run before requiring null pixels, so that is what I used. I have the longest run of about 6meters and the display all works fine. My question is.... What is the normal run length before requiring null pixels? And what would the symptom be if the length was too far and I did require a null pixel?