A 3mm Green LED Crystal is a small, energy-efficient light-emitting diode typically used for display purposes, indicators, or decorative lighting. Here’s a description for it:

LED Type: 3mm Green Crystal LED
Color: Bright Green
Size: 3mm diameter
Shape: Typically dome-shaped or with a flat top, depending on the model
Brightness: Varies by manufacturer, but it’s designed to emit a vibrant green light at low power
Voltage: Usually operates on 2V to 3.5V (dependent on the specific model)
Applications: Common in electronic projects, displays, lighting fixtures, and indicator lights for devices or machines. It can also be used for DIY projects or circuit boards.
Energy Efficiency: Low power consumption, long lifespan (typically 50,000 hours or more), and heat management make it suitable for both casual and professional use.

These LEDs are often used in a variety of applications such as status indicators, traffic lights, or even decorative purposes like lighting on models or in hobby electronics. Let me know if you're looking for something specific or have further questions!