Minor Lighthouse misinterpretation, here. They're not 'evil'. They're just a little bit... radical.
Lighthouse colors are... Let's go with their emblem being a dark blue circle, with a thick white bar dividing it. Simple, and easy to visualize.
Now then, some actual details about the Lighthouse Federation.
1) They're actually sorta democratic. They elect a leader, and follow him.
2) Their current 'Lantern' (elected leader) is a little pragmatic. This is his
theme. That should tell you a thing or two about his personality.
3) They honest to goodness think of themselves as the good guys, even if they get a little zealous now and again.
4) Their technology level is WAAAAAY above ours. But, they don't have internet. They have a very good communications system, and some solid networking capabilities, but they don't have access to the internet.