The final technical component of choosing recessed lighting is to determine whether you want line or low voltage. Line voltage operates directly off of the normal household 120-volt current. No transformer or special modern dimmers are needed. Line voltage is recommended when you have high ceilings and/or the need to provide general illumination to a room, as you can use up to a 150W bulb.
Low Voltage recessed lighting is a more energy efficient alternative that uses a 12-volt current instead of a 120-volt current. A special transformer is needed to reduce the voltage and special modern-dimmers are required if you want a dimming feature. Low voltage is recommended when you want to create high contrast and/or are using the recessed lights as a form of task or accent lighting.