Alright, I am done with it. Right now it is just 3 Bright White LEDs from a flashlight I found in a lot (in San Fran by the city food bank), it was missing the switch. It has a 3 AA batteries, and the 3 LEDs in parallel. It is brighter than my MagLight (though it should get new batteries), and my wind up LED light.
Below are some pictures... If I am doing it right...
Edit - The LEDs got really hot, and was melting the hot glue around them (so pretty darn hot) and one burned out. I replaced it with 5 LEDs from my wind up flashlight, and with more power, the LEDs were brighter.
High intensity LEDs need a way to bleed off heat, which is why I'm thinking that using PVC isn't really a good idea. If you can get your hands on some copper or brass and then use some kind of thermal compound (preferablely not electrically conducting) to link them together, that would be much better. PVC insulates way too much. One unorthodox, but possibly cheaper method than thermal compound/glue uses paraffin oil surrounding the LED, but then you need to seal it so it doesn't make a mess.