Would one set of dual 12" be enough for a normal mid tower case? I assume they're not connected, right? I think I'll be stuck with blue, because I don't think the white LED's on my CPU fan will look good with green or red.
I'll have to cancel the cathodes I ordered for my car.
the second one looks just like a cold cathode to me. i think they just call them neons since thats what people are used to.
neons don't get dangerously hot no, but they are a fair few degrees hotter than cold cathodes. hence why you dont really see them anymore. you dont really want warm running lights inside a pc.
the leds look good though. the main difference between LED and Cathode lights is mainly the intensity. LEDs are brighter, directional, and much more full on. whereas cathodes fill the case with an even glow.
it depends what you want. if you really like bright glowing lights then go for the LEDs, sicne they will be noticeably brighter.