Hold the button for over half a second (long press), let go when the light flashes, before it turns off. The mode will now cycle through its adjustment range. When you like what you see, press the button once (short press) to select the adjustment. You may also leave the capsule light in "adjust" for a constantly changing effect :)
For more information about capsule lights, check out this video:
If you have any questions, please feel free to contact us!