Section 112.39-3 - Operation(a) The lanterns must be capable of providing light for at least 3 hours.(b) The lantern must be relay-controlled so that the loss of normal power causes the lanterns to light.CGD 74-125A, 47 FR 15267, Apr. 8, 1982, as amended by CGD 94-108, 61 FR 28287, June 4, 1996