Choosing the right size light fixture for your space involves considering the size of the room, theheight of the ceiling, and the function of the room. Here are some steps you can follow to helpyou choose the right size light fixture: Determine the size of the room: Measure the length and width of the room in feet and thenadd those two numbers together to get the room's size in square feet. Determine the ceiling height: Measure the height of the ceiling from the floor to the ceiling3. Consider the function of the room: Different rooms have different lighting needs, Forexample, a dining room might require a larger, more decorative fixture than a hallway. Use the following quidelines to choose the appropriate size light fixture: 1.For a room with a ceiling height of 8 feet, choose a fixture that is 7 inches to 20 inches in. diameter. 2.For a room with a ceiling height of 9 feet, choose a fixture that is 9 inches to 22 inches indiameter. 3.For a room with a ceiling height of 10 feet, choose a fixture that is 10 inches to 24 inches indiameter. 4.For a room with a ceiling height of 11 feet or higher, add an additional 3 inches to thediameter of the fixture for every foot of ceiling height. Keep in mind that these are general quidelines, and your specific space may require a larger orsmaller fixture depending on the style, shape, and amount of light needed.