Output from the test tab is, in most cases, always in RGB sequence. It actually turns on every 3rd channel, i.e. 1,4,7,10 etc for red and 2,5,6,11, etc for green, etc and then all channels for white. A quick way to test your lights to ensure the correct RGB, BRG, GRB etc. is set properly, is to turn on channel 1. That should turn on RED. Next would be to turn on channel 2, that should be Green and finally Channel 3 should turn on Blue. Go to the first light of the string . Select the first 3 channels in the setup i.e 97,98, 99. Check that Model is defined as RGB. Use background color and move the first (Red) bar only up. Green turned on for first light. Move first bar down and move the second (Green) bar only up. Blue turned on for first light. Move second bar down and move the third (Blue) bar only up. Red turned on for first light. So the controller should be set to GBR.