DC Dusk-to-Dawn Light Sensor Switch, 3.7–24 V

Switch a compatible low-voltage light on when the surroundings become dark and off again in daylight. This compact inline sensor module adds light-responsive control to a matching DC lighting circuit without a timer or app.

Let ambient light control the circuit

• ✅ Automate the evening switch-on — the selected night-on version responds when light levels fall.
• ✅ Avoid setting a daily timer — ambient-light sensing follows changing daylight rather than a fixed clock time.
• ✅ Fit it into a matching DC circuit — separate input and lamp leads provide the connection points for a compatible setup.

Night-on sensor-switch module for DC 3.7–24 V circuits, with a stated maximum current of 5 A. Match the lamp load, voltage and polarity to the module and follow its wiring diagram. The sensor must remain exposed to ambient light and away from the lamp's direct output. One module only; lamp, battery and power adapter are not included. This is a low-voltage DC component, not a mains-voltage switch.

The product images show the inline module, input/output leads and night-on operation.

Check your DC lighting circuit and add automatic dusk-to-dawn control.