USB Cold Cathode?

I have been wondering about creating an ambient glow around the back of my iMac with a usb powered cold cathode light or led strip, could anyone help me with this? i would prefer a prefab solution that doesn't involve much soldering or modification of hardware but that stuff is not necessarily beyond my skill level.

(and sorry if this is in the wrong place, its my first post :P )

Picture of USB Cold Cathode?
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awesomesquared (author) 7 years ago
Thanks for everyone's replies. I have decided to use a cold cathode light and an AC adapter to plug it into the wall, thus having lighting when my computer is off/in sleep mode. plus i don't think i could bring myself to plug anything i made myself into my computer

again, thanks for making my first forum post a success!
caitlinsdad7 years ago
Lots of pc enthusiasts light up the case with LEDs or cold cathode lights. Just search for pc case mods. The lights do tap off of the computer power supply or else the USB bus or an external wall wart. Easiest thing is to hook up a string of Christmas tree lights taped to the back of the imac. Look to pc parts places like,, at the light kits they might sell. Good luck.
awesomesquared (author)  caitlinsdad7 years ago
thanks for the reply... i am thinking that the wall wart would be the way to go, but most of the cold cathode lights i see only have 4-pin molex, are you aware of an adapter from wall wart to molex?
Do you not have a spare MOLEX in te case? Oh, it's a Mac, probably not.

It'll probably only use 2 pins, centre 2 pins (black) are 0V, the red is 5V and the yellow one is 12V.

LED strips are also available, and may be a better low-power solution. These will require a little soldering, but will not require the HV supply needed for normal tube lights.

It is a reasonably simple operation to take a 12V tap off the psu.