Using these 10mm RGB diffused LEDs is easy. First, connect them according to the common cathode design. Make sure to supply a forward current of 20mA and the appropriate forward voltage for each color (2.0V for red, 3.2V for green, and 3.1V for blue). When handling, be gentle as the LEDs can be fragile. Keep them away from excessive heat and moisture to ensure a long lifespan. If you need more details, refer to the datasheet and LED tutorial provided.