I have some confusion that I hope can be cleared up by the collective heads on here. I will try to detail what I have going on as best as I can, so please bear with me. I have my pixels set up for power injection three different ways, but all similar in hook up. the only difference being the pixel form factor. First off, and one of the two ways I have no issues with, I start with a Sandevices E682. I am only using one output of one grouping. I am not using power to the pixels through the E682, but rather just the signal hooked up. I am only going out around three feet to a "signal In" outdoor three conductor weatherproof connector which goes in, by signal only, to a terminal block. The power comes from a Phoenix contact 12V dc 10 AMP din rail mounted power supply (we have a glut of these from retrofits to CNC machinery and the such). There are three of these power supplies in the box, all coming from the same 120 Volt plug (through a terminal block) Output joins the +volt in, negative and signal into a three pin weatherproof screw plug. From there it goes out on around a 4 foot pigtail to another three pin connector which is connected to the lights. coming back in through another three pin connector where the +volt is "interrupted" but the signal continues to the terminal block to continue the chain and the negative gets collectively connected to a terminal block. This continues 6 times using three power supplies and I have no problems. Second setup I have is where I use another E682 and each power supply is in its own enclosure but basically the same setup; e682 - signal in - +volt, negative and signal out - light strip - +volt interrupted - Negative and signal continue on to the next power supply and then on to the next strip and so on. Again, no issue with this at all, works like a dream. The third way, the only thing different is the actual lights. I have everything hooked up the same way as the first example, but when I hook up the lights, I get all on and flickering, some spastic flickering of various lights and generally not behaving when no signal for a test pattern is given. Once a test pattern is directed (all red for instance) it behaves exactly like it should, all red, and no problems. but once you direct no test pattern, it goes back to glitching. I have tried tying all 12 volt negatives together and that does nothing for the issue, I tried disconnecting everything and just using a single power supply and I get the same glitching. I hooked up the pixel strip to see if that would work and it did just fine, so I know it isn't the board. I still have yet to check the power supplies being as the connectors to the light strings are different, but I cannot see how that would affect this problem. The phoenix contact line of trio power supplies are supposed to be filtered and quite nice from what I hear. The first trouble shooting issue I would like to see is if I do indeed have the lights hooked up correctly. I cannot seem to find out any information on these lights, so I traced what I could and, since it lights up red when directed to (and blue and green respectively) I cannot see that my hook up is incorrect at all. I tried shorter leads (only a foot or so) and no change could the 120 volt wires passing by the 12 volt and signal wires cause actually that much disruption and noise to cause this? I will try to re-route them in the mean time to eliminate that possibility, but what else can be causing this?