We purchased 2 nanoleaf bulbs, but they stopped being able to have just plain "white" 6500k light. We sent the bulbs back, and after a few weeks we received the new replacement bulbs. There was a bit of a mix-up with the shipping labels (to return the bulbs) and because more than one service representative emailed me, there were some confusing mis-communications. But they were easily resolved and the new bulbs work just as they should. Thank-you!