8mm Photocell Light Sensor Switch Auto On/Off DC 3–24V Module

8mm Mini Photocell Light Sensor Switch – Automatic On/Off for Energy-Efficient Lighting

Take control of your lighting automatically with this compact 8mm Mini Light Sensor Switch Module. Designed for DIY enthusiasts, home automators, and electronics hobbyists, this photocell switch intelligently turns lights on or off based on ambient light levels — no timers, no manual switching, no wasted energy.

How It Works

This smart sensor module offers two selectable working modes to suit your setup:

• Night Mode: Light activates automatically when it gets dark and turns off during daylight hours — perfect for basement stairwells, utility rooms, pathway lighting, and security lights.
• Day Mode: Light activates when ambient light is detected and switches off at night — ideal for display lighting or daytime indicator applications.

Key Specifications

• Operating Voltage: DC 3V – 24V (compatible with 3V, 3.7V, 5V, 12V, 24V systems)
• Maximum Current: 2A
• Module Dimensions: 28mm × 8mm × 4mm
• Material: Durable plastic housing
• EU LVD Compliant: Low voltage (below 50V AC or 75V DC)
• Package Includes: 1 × Light Sensor Switch Module

Why You'll Love It

• ✅ Ultra-compact 8mm design — fits easily into tight spaces and custom enclosures
• ✅ Wide voltage range — works with most DC systems from 3V to 24V
• ✅ Energy-saving automation — eliminates lights left on unnecessarily
• ✅ Dual working modes — versatile for day or night activation
• ✅ Easy to integrate — ideal for Arduino, LED strip, and low-voltage lighting projects

Great For

Basement lights, utility room lighting, garden path LEDs, cabinet lighting, aquarium lighting schedules, DIY smart home projects, solar-powered systems, and any low-voltage automatic lighting application.

Made in Mainland China.

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Frequently Asked Questions

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

A: This mini light sensor switch module supports a wide DC operating voltage range of 3V to 24V, including 3V, 3.7V, 5V, 12V, and 24V systems. This makes it highly versatile for use with Arduino boards, LED strips, battery packs, and other low-voltage DC lighting setups.

Q: Can I use this sensor switch for outdoor or basement lighting automation?

A: Yes! The photocell switch is ideal for basement stairwells, utility rooms, garden path lights, and outdoor low-voltage lighting. In Night Mode, it automatically turns lights on at dusk and off at dawn, making it a set-and-forget energy-saving solution.

Q: How do I switch between Night Mode and Day Mode?

A: The module supports two working modes — Night Mode (light activates in darkness) and Day Mode (light activates in ambient light). Switching between modes is done via the onboard configuration on the module. Please refer to the included documentation or the product wiring diagram for setup instructions.

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

A: The module supports a maximum current of 2A, making it suitable for LED lighting and other low-power DC loads within the 3V–24V operating range. Ensure your connected load does not exceed this rating.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.