Thanks for the info. 

I'm debating if I should try opening the engine vents and putting in a couple of small CPU fans to help pull the heat out.  Of course that will introduce more issues like light bleed that I would have to see how to deal with.

I have a feeling that I may need to go with LED strips for my engines as well instead of the EL sheet, as I'm not sure the EL sheet will give me a realistic engine glow like I could get from LEDs.  Of course that will affect the power requirements and heat.