How to use piranha LED in circuit?

I am doing a project which involves around 20 Piranha LEDS. I am really stuck as I can't work out how they will go in the circuit, I know this may sound simple but it is really bugging me! There will be an 8pin picaxe chip going to a ULN2803( which I believe is a small integrated circuit with 8 transistors) which is then going to power the LEDS. I have worked out that the piranha LED has 3 colours and the resistors are red - closest to 72ohm, green/blue - closest to 80 ohm. Any help would be appreciated. Thanks.

What are piranha LEDs?

it has 4 'prongs' or legs- one for red, one for green one for blue and a negative, i think..

You need to get a part number for the specific LED assembly, and post a link to its data sheet. It may have current limiting resistors built-in????

What is the power supply voltage?