Before you complain about the flickering lights, you should know the difference first between the flickering based on the mode and the flickering based on the volts or power.
Flickering based on the mode is normal. It is part of the features of the product. This flickering does not hurt the eyes and is not frequent. However, the flickering based on watts or power may be telling you something. If it flickers almost every second, there may be something wrong with the volts. When you see this happening, you should consider changing it already before something bad happens. Also, if it doesn’t flicker a lot and it is too dim, it may be because of the power which produces less supply to the bulb itself.