Yeh, if you could the products would not be on sale.
Only thing you can get from your PC is RSI, various sight problems from keeping your eyes focused to close and a belly.
No risk really, just googled it and it doesnt pop anything up at all just to be sure.
The cathodes do however make a huge draw on the PSU when turning on, just something to remember when you run them that they can blow cheap PSU's quite easily.