Luminous efficiency values have been calculated empirically as a function of velocity and altitude for the Lost City, Innisfree, and Pribram meteorites. We have used a combined approach which utilizes the observed light data from the meteorite entries and the appropriate ablation rates via the entry model of ReVelle, which is generally consistent with the results of cosmic ray track analyses. Although our method reduces the absolute value of computed luminous efficiency via a total kinetic power balance equation, our results still exceed the modified Trailblazer results of Ceplecha and McCrosky for chondrites by about a factor of 5 for entry velocities of ≲20 km/s. Our values of luminous efficiency (deduced with respect to a detector peaked in the visible) are ~0.2--0.4% in the vicinity of peak ablation for Lost City and Innisfree, respectively. Results for Pribram are less certain but are ~0.04% at peak ablation. In terms of numerical values and velocity dependencies our results agree well with appropriately modified laboratory simulation data of Givens and Page (1971). We conclude that the deduced photometric mass scale of fireballs should be revised downward by a factor of 5--10 so that a more accurate mass influx determination at the earth's orbit can be made.