10-Pack 3mm RGB Flash LED Light Beads – Fast & Slow Flashing Rainbow Colors

Add vibrant, eye-catching color to any DIY electronics project or decorative display with these 3mm RGB Flash LED Bulbs from HVIERO. Available in fast and slow flashing modes, these round clear-lens LEDs cycle through red, green, and blue — creating a stunning rainbow effect perfect for everything from billboards and showcases to home décor and creative maker projects. Made in Mainland China.

Key Features

RGB Rainbow Flashing: Automatically cycles through red, green, and blue hues in fast or slow flash patterns — no external controller needed.
Clear Water Lens: Colloidal transparent housing delivers a bright, clean light output for maximum visual impact.
Low Voltage Operation: Runs safely at 2.0–3.4V forward voltage (2.0–2.4V for red; 3.2–3.4V for blue and green), making them ideal for low-power circuits.
Energy Efficient: Approximately 40% lower power consumption compared to traditional energy-saving lamps at only 100mW power consumption.
Fast Response Time: Near-instant switching enables dynamic, responsive light effects for displays and signage.
Mercury-Free: Contains no harmful heavy metals — a safer choice for your projects and the environment.
Long Service Life: Built to last, reducing the frequency of replacements.
Wide Temperature Range: Operates reliably from -55°C to +100°C, suitable for both indoor and outdoor applications.

Technical Specifications

Model: F3 3mm Fast/Slow Flash RGB Round LED (Model No. 700A/B-45)
Lens Color: Water Clear (Colloidal Transparent)
Forward Voltage: 3.2–3.4V (Blue, Green) / 2.0–2.4V (Red)
Operating Current: 10–20mA
Power Consumption: 100mW
Pulse Current: 60mA
Reverse Voltage: 6V
Reverse Current: 10µA (test condition: 5V)
Lead Length: Positive: 17.5mm / Negative: 15.5mm (±0.5mm)
Soldering Temperature: 260°C, complete within 5 seconds
Operating Temperature: -55°C to +100°C
Storage Temperature: -55°C to +100°C
Certification: CE
Quantity: 10 pcs per pack
Origin: Made in Mainland China

Ideal Applications

DIY electronics and maker projects
Billboard and signage decoration
Landscape and architectural accent lighting
Holiday sculptures, seasonal displays, and themed entertainment
Bars, dance venues, porches, railings, staircases, bridges, and parks
Showcases, storefronts, and retail display lighting

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Learn More

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

Package Includes

10 × 3mm Fast/Slow RGB Round Flash LED Light Beads (fast or slow flash as selected)

Frequently Asked Questions

Q: What is the difference between the fast flash and slow flash RGB LED options?

A: Both fast and slow flash RGB LEDs automatically cycle through red, green, and blue colors without any external controller. The fast flash version transitions between colors rapidly for a dynamic, energetic effect, while the slow flash version changes colors gradually, creating a calmer, smoother light display. Select your preferred version at checkout.

Q: What voltage and current do these 3mm RGB flash LEDs require?

A: These LEDs operate at a forward voltage of 2.0–2.4V for the red channel and 3.2–3.4V for the blue and green channels. The standard operating current is 10–20mA. They are suitable for use in most standard low-voltage DIY circuits and breadboard projects.

Q: Can these RGB LED bulbs be used outdoors?

A: Yes. These LEDs are rated for an operating temperature range of -55°C to +100°C, making them capable of handling outdoor conditions. However, they are bare through-hole components and are not waterproof on their own — ensure appropriate weatherproofing enclosures are used for outdoor installations.

Q: Do I need a resistor when using these LEDs in a circuit?

A: Yes, it is recommended to use a current-limiting resistor in series with each LED to protect it from excess current. Calculate the appropriate resistor value based on your supply voltage and the LED's forward voltage and current specifications for best results and longevity.