22. Can they change colors? Yes, they can only change the color if they are known to be RGB Smart light bulbs which means that they can emit a different color of light through a single, smart bulb. Not only that but even some of the RGB smart bulbs in the market can produce around 16 million different colors from just a single, smart bulb that too simultaneously. If you can connect that smart bulb to your phone, then it is good because you can easily change the color of the bulb from your phone according to your mood. Not only that, but you can even use the voice assistant if they are paired to change the colors.