The authors have calculated the production and destruction of the 3.7-h, 123-keV isomeric state of ¹⁷⁶Lu, by photons as well as by neutrons. They used absolute photon strength functions and discrete nuclear level sets for ^175-177Lu. Their results for the photon-induced production of ^176mLu are remarkably different from the experimental measurements in the current literature. They calculate much larger cross sections for this reaction, and a lower threshold than had previously been assumed. These two effects combine to indicate an enormous correction, a factor of 10⁷, needs be applied to shorten the current estimate of the half-life against photoexcitation of ^176mLu as a function of temperature.