1:25th scale trucl (LED LIGHT) HELP

[model1:25th scale]

I am trying to figure out what size of and LED light set I would need to make my peterbilt light up? I am not sure if a 5MM or a 3MM LED light will work?

thank you for you help.

The picture will show you what I am trying to do. I have not started to build this yet, because I am stuck with my LED light.

[Tesla]

Try this topic posting: http://www.modelcarsmag.com/forums/index.php?showtopic=34921

Lots of good lighting info and a spectacular build!

[model1:25th scale]

thank you