Buy a standard 5mm Red color LED that can be used for indication or visualization purposes.
LED Red Color 5mm
American Raspberry Pi Shop. One stop shop for all your Pi needs. Raspberry Pi add-ons, HATs, accessories, Starter Kit, Media Center kit, RetroPi
Diffused Red 5mm LED (10 Pack)
Need some really bright LEDs? They are very bright and have about 20degree LED beam. They go easily into a breadboard and will add that extra zing to your project.
Adafruit Super Bright Red 5mm LED (25 Pack) [ADA297]
Buy 5mm LED - White Color LED Online – QuartzComponents
Red LED, 5mm
5mm Round LED Indication - Discrete Electronic Components Distributor DigiKey
ATmega328/168/8/48/88 Programming Shield
Standard high quality 5mm LED in a coloured package. Suitable for power and status indicators, back-lighting, message displays, etc.
5mm Red LED
Chanzon 100 pcs 5mm Red LED Diode Lights (Clear Round Transparent DC 2V 20mA) Bright Lighting Bulb Lamps Electronics Components Indicator Light Emitting Diodes : Industrial & Scientific
This is 4 leg RGB led which makes design compact and saves space. The three legs are for Red, Green and Blue color and remaining one is for…
5mm Round LED Indication - Discrete Electronic Components Distributor DigiKey
5pcs 5mm Red Round LED Diode Electronic Component Emitting Light 1.9-2.1V