Hmmm, not sure. I would be concerned with the level of resistance when the cable gets that long. If you take 3 six foot sections of RJ11, string them together and try to power a Valentine One, it wont work. Two 6 ft sections linked together, no problem. According to my buddy who is a master installer, lengthening the RJ22 LED cable with an extra 36" is not a problem. I guess an LED doesn't require much voltage to operate.