The size of your fixture will depend on your best led ceiling lights height and the square footage of your space. Keep in mind that there are no strict rules when it comes to fixture placement — personal preference and design aesthetic is sometimes enough to go on. A common rule of thumb is one recessed light for every 4 to 6 feet of ceiling space. Typically, fixtures should be placed 24 inches from a wall or cabinet with 2 to 5 feet of space between them. Keep in mind that for a bedroom, for example, you won’t need it as bright as a kitchen, so you can often get away with less fixtures.