1-2 A glowing review…Nice gear for lighting up your PC case mod. “The Cold Cathode Tube kit was interesting, as some similar products seem to be plagued by high-pitched noises from the inverter and slow warmup times. Thankfully, neither of these effects was visible in this kit and was surprisingly silent. This CCFL set came with 2 x 30cm UV tubes which were very bright (certainly better than most I’ve seen), this allows you to place them either side of your case to light up many UV items.” Link.