Final answer:
Recessed ceiling lights in contact with insulation should be rated IC (Insulation Contact) to ensure they can handle the heat build-up and prevent fire hazards.
Step-by-step explanation:
Recessed ceiling lights should be rated as IC (Insulation Contact) if installed against insulation. This rating ensures that the lights are designed to be in direct contact with insulation without posing a fire hazard. Considering the R-value, which is used to measure insulation's resistance to heat flow, it's important to choose lights with the IC rating when dealing with ceiling installations.
These types of lights are specially constructed to handle the heat build-up that can occur in insulated spaces. Moreover, the R-value is important in household insulation.
For instance, in cold climates, where ceilings are typically insulated with 6.5-inch thick fiberglass batts which have an R factor of 19, the choice of an IC-rated recessed light would be essential for safety and energy efficiency.
Recessed ceiling lights should be rated IC-rated if installed against insulation. IC (insulation contact) rating means that the light fixture is designed to be in direct contact with insulation without creating a fire hazard. This rating ensures that the fixture has proper insulation to prevent overheating and complies with safety regulations.