This power supply provides highly regulated voltage output so your lighting or special effects won't get fried.. With a full 12 volts and 1.25 Amp continuous-duty output, its an excellent power source at a very reasonable price. It can handle nearly any lighting project and requires only minimal space. It can power nearly 200 white LEDs (using series/parallel wiring). The 12-volt supply cord is 6 ft. long and is equipped with a EMI/RFI filter to minimize electrical interference. This is a true switching power supply like the kind inside your computer. Unlike the "wall warts" (battery eliminators) you can buy at any electronic parts store for $8-$12, it doesn't use a transformer or have a simple two-diode circuit. And, it has over-current and short-circuit protection.