what cap would you use in this situation

hi, i'm building a LED cube. the LED drivers will be MBI5026. each one will drive 16x 20mA leds.

each chip will be close to the row of leds to save wiring but that means that each chip will be about 10cm from each other and i plan to connect power and ground with hookup wire.

what gauge hookup wire would be good for power and ground (assume 8 chips are on a power bus back to the 5v 20A PSU) and should i put caps across power and ground on each chip?

if it needs caps, what would be good values?

thanks, steve