100pcs 3mm RGB Flashing LED Diodes – Fast & Slow Multicolor

100pcs 3mm RGB Flashing LED Diodes – Fast & Slow Flash, Multicolor

Light up your next DIY project, billboard, or decorative display with this versatile pack of 100 x 3mm RGB flashing LED diodes. Available in fast-flash and slow-flash modes, these compact round-bead LEDs cycle through vibrant red, green, and blue hues automatically — no external controller needed. Whether you're crafting an eye-catching sign, decorating a stage, or adding atmosphere to a bar or event space, these LEDs deliver brilliant color at an incredibly affordable price.

Key Features

• Auto Color-Cycling RGB: Automatically transitions through red, green, and blue — creating a dynamic rainbow effect without any extra circuitry.
• Fast & Slow Flash Modes: Choose from rapid or gentle flashing to suit your project's mood and style.
• Energy Efficient: Approximately 40% less power consumption than standard energy-saving lamps — only 100mW power draw per LED.
• Low Voltage Operation: Runs safely on 3V (Blue/Green: 3.0–3.4V; Red: 2.0–2.4V), making it ideal for hobbyist and professional electronics projects alike.
• Wide Temperature Range: Rated for operation and storage from -55°C to 100°C, ensuring reliable performance in diverse environments.
• Water-Clear Lens: Transparent colloidal lens maximizes light output and color vibrancy.
• Compact 3mm Form Factor: Small size fits into tight spaces and a wide range of enclosures and project builds.
• Long Service Life: Durable construction for lasting performance in both indoor and outdoor applications.

Specifications

Applications

These 3mm RGB flashing LEDs are perfect for a wide range of creative and functional applications:

• Billboard and signage decoration
• Landscape and garden lighting accents
• Theme parks, bars, discos, and entertainment venues
• Street, sidewalk, bridge, and park lighting features
• Porches, staircases, railings, and ceilings
• DIY electronics, hobbyist circuits, and maker projects
• Showcase and display lighting

Package Includes

• 100 × 3mm Fast/Slow Flash RGB Round LED Diodes

Usage Tips

• Always use a low-voltage power supply to ensure safe operation.
• Ensure adequate heat dissipation during extended use.
• Store in a cool, dry place when not in use.
• Do not exceed the maximum rated temperature.
• Test each LED before installation to confirm functionality.
• Handle carefully to avoid bending or damaging leads.

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For general guidance on LED and electronics safety standards, visit the U.S. Consumer Product Safety Commission (CPSC).

Frequently Asked Questions

Q: Do these 3mm RGB LEDs require a separate controller to flash?

A: No! These RGB flashing LED diodes have a built-in integrated circuit (IC) that automatically cycles through red, green, and blue colors. Simply connect them to an appropriate low-voltage power supply (3V) and they will flash on their own — no external controller or programming required.

Q: What is the difference between fast-flash and slow-flash RGB LEDs?

A: Fast-flash LEDs cycle through colors at a rapid rate, ideal for eye-catching billboards, dynamic signage, or party lighting. Slow-flash LEDs transition more gently, creating a calm, flowing color effect suited to decorative displays, mood lighting, or landscape features. Both types are included in this versatile 100-piece pack (select your preferred variant when ordering).

Q: Are these LEDs suitable for outdoor use?

A: These 3mm RGB LEDs are rated for a wide operating temperature range (-55°C to 100°C), making them suitable for use in various outdoor environments. However, they are not waterproof on their own — for outdoor installations, we recommend enclosing them in a weatherproof housing or applying a conformal coating to protect against moisture.

Q: What power supply should I use with these RGB LEDs?

A: These LEDs operate at 3V (Blue/Green: 3.0–3.4V; Red: 2.0–2.4V) with a forward current of 10–20mA. A regulated 3V or 3.3V DC power supply with a current-limiting resistor is recommended for safe and reliable operation. Always stay within the specified voltage and current ratings to maximize LED lifespan.