lighting

PC lighting is probably the second most common form of PC case modding most often used for PC lighting is CCL (cold cathode light) and LED (light emitting diode).
PC lights can be be found in most colors of the spectrum including UV light.
installing a PC light is very easy,most just plug in to you PSU(power supply unit then you velcro them in place.

Cold cathodes are small florescent light tubes,similar to the neon lighting you see on signs but take more power than led.

this blue Cold Cathode Light is $6 from here






LED lighting is much more flexible and less power hungry but is  not as bright as cold cathodes

A clear PC case making full use of LED lighting:



Where to buy: here