DC 3.7V–24V 5A Auto Light Sensor Switch | Day/Night Photocell

HELTC DC Light Sensor Switch – Automatic Day/Night Control

Take the hassle out of manually switching your lights on and off. The HELTC DC Light Sensor Switch uses a built-in photocell to detect ambient light levels and automatically control your lighting — ideal for street lights, garden lights, security lights, and low-voltage LED systems. Simply set your preferred mode and let the sensor do the work.

Two Flexible Working Modes

• Night Mode (Auto ON at Dark): The light activates automatically when darkness falls and switches off at daybreak — perfect for outdoor or security lighting that you want running overnight.
• Day Mode (Auto ON in Daylight): The light activates during the day and turns off at night — great for display lighting, signage, or daytime accent illumination.

Key Specifications

• Working Voltage: DC 3.7V – 24V (compatible with 3.7V, 5V, 12V, and 24V systems)
• Maximum Current: 5A (recommended: ≤4A at 12V; ≤2A at 24V)
• Detection Range: 0–10 metres
• Sensing Delay: Default 30-second delay to prevent false triggering
• Material: Durable plastic housing
• Package Includes: 1 × Light Sensor Switch set

Why Choose This Light Sensor Switch?

• ✅ Wide voltage range — compatible with most DC low-voltage lighting systems
• ✅ Dual modes for complete flexibility (night-on or day-on operation)
• ✅ Built-in 30-second delay prevents flickering or nuisance switching
• ✅ Easy to install — no complex wiring required
• ✅ Compact and lightweight design suits tight installation spaces
• ✅ Ideal for solar-powered systems, garden lights, street lamps, and LED strips

Typical Applications

• Outdoor garden and pathway lighting
• Solar-powered street and security lights
• Low-voltage LED strip automation
• Driveway and porch lights
• Display and signage lighting

Made in Mainland China.

Note: Actual product color may vary slightly from images due to monitor settings and lighting conditions. Please allow for minor measurement tolerances in listed dimensions.

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For general electrical safety guidance when working with low-voltage DC switching devices, visit the U.S. Consumer Product Safety Commission (CPSC).

Learn more: Photodetector

Frequently Asked Questions

Q: What voltage systems is this light sensor switch compatible with?

A: This automatic light sensor switch supports DC voltages from 3.7V up to 24V, making it compatible with 3.7V, 5V, 12V, and 24V DC systems. It works with a wide range of low-voltage lighting setups including solar-powered lights and LED strips.

Q: Can I choose whether the light turns on during the day or at night?

A: Yes! The switch offers two selectable working modes. In Night Mode, the light activates automatically when it gets dark and turns off at dawn. In Day Mode, the light turns on during daylight hours and switches off at night. You can configure the mode to suit your specific lighting needs.

Q: What is the purpose of the 30-second sensing delay?

A: The built-in 30-second default delay prevents the switch from triggering due to brief or temporary changes in light levels — such as a car's headlights or a passing cloud — ensuring stable, reliable operation and avoiding unnecessary on/off cycling.

Q: What is the maximum load current this switch can handle?

A: The switch is rated for a maximum of 5A. However, for optimal performance and safety, it is recommended to keep the load current at or below 4A when operating at 12V, and at or below 2A when operating at 24V.