The white finish 120 volt 28 inch Priori T2 cabinet light dimensions are 28 inches long by 3.75 inches wide and 15/16th of an inch tall. The fixture comes with a built in on/off switch, uses 18 watts of power and is not dimmable. Each cabinet light fixture has five knockouts that are 3/8 of an inch in diameter each for easy hard wiring. If you do not want to hard wire these fixtures, you can purchase the 6 foot power plug for these fixtures and plug them into a standard electrical outlet. Each light comes with an end to end connectors or you can purchase jumper cables of various lengths to interconnect the lights. The light fixture comes with a 18 watt T2 fluorescent light bulb and is UL listed for indoor use.