Pretty happy about this. Getting a solid 4.7V at the far end of my power bus on full white with setBrightness(128), drawing about 97W out of the wall.
A few dodgy joints though, which is gonna be an arse to track down 
Found the problem. Had severed a track in the process of cutting the silicone off, didn’t realise. Had enough leftovers to replace it though.
But wot is eet? 
You will see