I'm setting up a pc grow and I'm using a 120mm pc fan to vent. Obv it's a 12v fan.. I've looked around my house for adapters to wire it to and the closest I can find is 12.5v. I plugged it in and hooked the multimeter up to it and it read about 13.2-7v. Would this be safe to use for my fan or should I find a 12v adapter?