I have purchased 8 coreflute candy canes second hand. They have 16 pixels in each cane. I set them up and found I needed power injection to get them all to work. So I injected power at the start, in between cane 4 and 5 and also at the end. This improved things but I was still getting flickering on white. The flickering was also giving a rainbow of colours over a few pixels. I checked the voltage whilst running at each of the injection points and it was 12.4V. I noticed that the signal started flickering at cane 3, so I moved the injection point from half way and put it before cane 3. Issue solved, no more flickering. Not sure why this is though. I had two thoughts. First that the data signal was somehow diminishing after cane 2 and needed power to boost it back up or alternatively that I had a dodgy connection near cane three and maybe the data/power wasn't getting passed that point very well. It just seemed odd to me that the lights near the injection points were flickering as well as ones further away. I know I probably haven't given all the information required to sort this but any ideas on what to look for would be greatly appreciated. All pixels are 12v ws2811. As I said I've got it going but I'd like to know a likely cause of the problems. Whilst troubleshooting I moved the injection point at the end to two canes in from the end thinking the power could go both ways with less voltage drop. This made no difference.