Hey there Xamon,
It seems that the blue LED dies do in fact get hotter. I've even heard tale of the US colour disks reacting that way.
AB is a green die and blue die mixed, so that might explain why it's "cooler"
So yes, the LEDs do put out some heat. The colour is what determines that to my knowledge though.
LEE filters are for stage lighting, and can withstand higher temperatures. I'll direct you to this thread by Hazard502:
http://www.saberforum.com/index.php?topic=38175.0I hope it hasn't stuck to your LED module though.