Please check the following steps:
1. Press the button (3500k) / the upper button on the smart touch panel (Color Tune) for a long time.
If the light reacts by dimming the constant light regulator is switched on and measured enough light in your surrounding.
You can also test this by covering the two small openings at the sensor - this is how you simulated a dark surrounding.
2. Please check the controller module: Are all plugs inserted and locked correctly ?
3. Does the plug have electricty?
If you have checked all of the above and it still doesn't work, please get in touch with us.
Please use our contact form.