Ok, I bought a pair of 6 LED 168/194 replacement bulbs from an Ebayer in Korea to perform a test. I had some "blue" bulbs in there to begin with. I can't remember where I got them or who the manufaturere is (possibly PIAA, if I can remeber correctly).
Anyway, I wanted to see if quantity would make it brighter overall... as it happens, not really in the horns. Everyone was correct in saying that LEDs are more directional. I do like them, thought, and I'm assuming they should last longer than any bulb I put in there. Here are some test pics:
Here are all of the pics I took, if you want to check them out...
Bulb 1
Bulb 2
Bulb 3
LED 1
LED 2
LED 3
LED 4