What is the minimum rating required for recessed ceiling lights when installed against insulation?

Recessed ceiling lights that are installed in direct contact with insulation must have a rating of IC, which stands for "Insulation Contact." This rating means that the fixture is designed and tested to safely operate when in direct contact with building insulation without requiring a gap for air circulation.

Using IC-rated fixtures helps prevent overheating, which could lead to a fire hazard if a non-IC fixture is used in such installations. Therefore, compliance with the IC rating is crucial for ensuring both safety and adherence to building codes. This requirement is particularly relevant as many homes use insulation to improve energy efficiency and the space available for recessed lighting can often place these fixtures directly against insulating materials.

In contrast, options such as non-IC fixtures are not suitable for this application and would pose a risk when installed in contact with insulation. Low voltage does not address the specific fire safety concern with insulation contact, and high wattage is not a relevant factor in determining the required safety rating of the fixture.