I only use the 180 degree LEDs behind translites. I rarely put LED flashers as they are too bright and wash into surrounding LED effects. For a dark room, 180s are absolutely perfect. Some translites look awesome like CFTBL, ST TNG and some look awful - like Black Rose. You need to experiment with 180s. Here's where I get mine from ;
http://www.rtbb.com.au/catalog/index.php?cPath=22_119_121Cool White, Not Warm White for areas that wash into each other.