Avoid the airport runway look by not installing recessed lights in a row closely. The common rule is that if it’s a 4” recessed lighting fixture, place it 4’ apart. If it’s 5” recessed lighting fixture, place it 5’ apart. If you’re lighting a special feature such as art work, center the light fixture and 12-18” in front of it. If you’re lighting a 3D object, place the recessed lighting fixtures from 2-3 different angles. Also, use smaller sizes for smaller areas. If you’re lighting a tall hallway, then use 6” recessed lighting fixtures.
When deciding, be sure to know your home or business. For new construction or major remodeling projects, it will be fairly easy. Some recessed lighting fixtures are designed to retrofit applications and can slip into an existing ceiling space through holes made to accommodate wiring. Get advice on what parts you would need.