out of 8 pieces bought — one gives only cold white light now, totally unresponsive (after around 3 months of use it suddenly went out like that), the rest could be divided in two groups of colours (warmer/colder), with no way to calibrate it, and the colours change a bit after longer periods of time. the IR responsiveness could be better, too. ah the default mode after powering on is blinking colours, so any power loss gives you a sudden party 🤷🏻♂️