How many colors from one lamp: Set fixed color or 8 color in cyclic change. Click the light button lightly, set your favorite color from red/orange/yellow/green/cyan/blue/purple/white.
When you set color in white, to click button, 8 color will be in cyclic change;
How to work? Install the light in DC5V car UBS port, it only light up automatically when the light sensor sensons the environment is dark.
Long press on button: set the brightness brighter or darker by long pressing and release on the button by your preference.
Double click the button: Set the brightness in gradient breathing mode by double click on the button. Also you can restore setting by double click again if you like fixed birghtness mode.e setting by double click again if you like fixed birghtness mode.
Brightness is adjusted, very soft light and no dazzling to eyes.