Which LEDs for Poker II?

[Geroximo]

Hi,

I already read about this in the FAQ, but it didn't really help me.

I'm thinking about adding LEDs to my Poker II. I know how to solder, no problem, but I don't really know which LEDs will work ...

Which Voltage do I need? Around 3.2V? Or doesn't it matter?
How much mA do I need? 20mA? 30mA?
Are there colors I cannot use?
Can I use different colored LEDs as I want or are there restrictions?

Which are better - round or square LEDs?

Which LEDs did you use on your Poker?


Best regards
Geroximo

[Hellcatz]

used 2x3x4 square leds http://www.aliexpress.com/snapshot/6353146067.html?orderId=64670959666105
and this link should help http://imgur.com/a/Y2Yyn