& you can add a colored led from happ-$3.79(my sell price) or purchase from superbrightleds.com. Run 2 wires to you computer power supply & your ready to go & it looks great...
I'm going to ask what is probably a totally ignorant question here, and semi-hijack the thread at the same time...oh well, feel free to blast away.   

  I think I've been reading that for some leds you need to run a (resistor?) in line from your pc power supply depending on which led you use.  Are the 12v triple clusters ready to go without the same constraints? Is it truly just a connect and go kinda' thing?    
I'm talking about these from DM's listing:
TRIPLE CLUSTER LED'S FOR YOUR COIN DOORS OR TRACKBALLS
91-10WB-123Y   Yellow  T 3-1/4 Cluster (3) 12 vdc -$3.79
91-10WB-123R   Red T 3-1/4 Cluster (3)  12 vdc     -$3.79
91-10WB-123G   Green  T 3-1/4 Cluster (3) 12 vdc -$3.79
91-10WB-123B   Blue T 3-1/4 Cluster (3) 12 vdc     -$3.79
91-10WB-123W   White T 3-1/4  Cluster (3) 12 vdc -$3.79
Thanks,
Rick