What type of rating should recessed ceiling lights have if installed against insulation?

Recessed ceiling lights installed against insulation should have an insulation contact (IC) rating. This rating indicates that the fixture is designed to safely come into contact with insulation without posing a fire hazard. IC-rated fixtures are built with materials and construction methods that allow them to dissipate heat effectively, preventing excessive temperature buildup. This is crucial in residential settings where insulation is present, as improper installation of non-IC-rated fixtures could lead to overheating and increase the risk of fire.

The other ratings, such as non-IC, indicate that the fixture must be installed with a certain clearance from insulation to avoid overheating. Therefore, selecting an IC-rated fixture ensures compliance with safety codes and promotes energy efficiency, as it allows for better integration with insulation in ceilings or walls. The specific characteristics of type A and type B do not pertain to this requirement, further emphasizing the significance of using the correct IC rating in these applications.