These are well made fixtures and more durable than others I have installed. I've had inspectors who didn't install because they didn't see the thermal switch that is usually present on IC devices. This category includes fixtures designed to be mounted in walls, ceilings, and similar locations as defined by Section 410, NFPA 70, and the National Electrical Code. A luminaire whose external surface temperature does not exceed 90Β°C, even if insulated, misplaced or covered, will be marked with theβ¦