TruOpto 5mm Round LEDs Bi-Colour Flashing – TruOpto OSYBMS5A31A, This LED is of the flashing 5mm round bi-colour type and features high luminosity yellow and blue colours. Ideal for applications such as toys, games, AV equipment, decorative lighting, etc. TruOpto OSYBMS5A31A 5mm Bi-Colour Yellow / Blue Flashing LED 30° 3.3V 20mA