Great idea, that sounds logical. Not worried about differences in colour (K) as can put the odd one out in the 'office' (I use that word advisedly it's more like a tip) side of the room where it will look like a deliberate attempt to differentiate the uses of the room.Try fitting just 1 halogen MR16 and put LEDs in the rest, you may find it works and if it does then you will be saving some energy costs over all of them being halogen.