CRF series is for recess clean room ceilings with energy saving 2 tubes, 3 tubes, and 4 tubes T5 or T5 high output. IP54 rated with gasketed hinged door. Ideal for pharmaceutical, semiconductor manufacturing and biomedical labs, food processing plants, hospitals, where the integrity of the clean room is maintained and protect against infiltration of particles. Also best solution when requiring lighting load as low as 2 watts/square meter/100 lux. 2’x4’, 1’x4’, 2’x2’, 1’x2’ Metric sizes available.