Yes its an easy explanation. You set the Dimming Curves for those models to have a Brightness of 100. They need that to be set back to 0. That means boost it 100%. So a primary color like green is 0, 255, 0 which when boosted 100% still comes out to 0, 255, 0. But when you have light purple which is 128,128,255 and boost it 100% it becomes 255,255,255 which is white.