Low-voltage systems are often identified with "smart-house" duties, such as remote control of appliances. But the simplest and most obvious use is for lighting. Low-voltage lighting fixtures are powered by a transformer that lowers the voltage and converts the current from 120 volts AC to 12 volts DC. Compared with traditional incandescent lighting, the main advantages of using low-voltage for lighting are more precise focus of the light, better light quality, and lower operating cost. Improved Beam Control With most incandescent fixtures, only the intensity of the light can be varied by changing the wattage of the bulb. With most low-voltage fixtures, however, the source of light is a halogen-filament lamp. The
