What LED lamps should I select if I want to add LED to my Akko mechanical keyboards?

We recommend two types of LED lamps (diodes):

1. 3mm round type LED lamps 
2. 2x3x4mm square head LED diodes.

Acceptable Specification:

Voltage:1.8-3.6V; 

Ampere: less than 500 mA. 

Note please choose single color LED diodes. If you choose RGB LED diodes, it will emit only red colors.