Recessed lighting has four main disadvantages: poor energy efficiency from heat loss through ceiling penetrations, limited light spread that creates dark spots in larger rooms, difficult retrofits in insulated ceilings, and higher installation costs than surface-mounted fixtures.
Each recessed can cuts a hole in your ceiling — and that hole is a path for conditioned air to escape into the attic. In a room with six cans, that's six penetrations working against your HVAC system year-round. The cone-shaped beam pattern also means recessed fixtures light a narrow column below them rather than washing the whole ceiling, so rooms wider than about 12 feet typically need multiple cans spaced carefully to avoid dim zones between fixtures. Surface-mounted flush mount fixtures avoid all of these tradeoffs.
- Recessed can spacing rule: one fixture per 4 feet of ceiling width to avoid dark zones between cans.
- Air sealing recessed cans in insulated ceilings typically requires IC-rated (insulation contact) housings — not all cans qualify.
- Recessed retrofit kits run $15–$40 per fixture; new-construction recessed housing installs run $100–$200 per can including labor.
- Standard recessed cans require 6–8 inches of ceiling depth clearance — problematic in shallow joist bays.
- A flush mount ceiling fixture covers roughly 150–200 sq ft from a single junction box; recessed lighting typically needs 4–6 cans for the same area.