Hα luminosities [L(Hα)] for (a) all H II nuclei in our survey observed under photometric conditions, (b) nuclei with types S0–Sbc, (c) nuclei with types Sc–I0, (d) starburst nuclei from Balzano (1983), and (e) first‐ranked disk H II regions from Kennicutt (1988). Each bin corresponds to 0.25 in logarithmic units. Our survey luminosities were corrected for internal and Galactic reddening, estimated from the observed Hα/Hβ ratio, using a Galactic extinction curve (see Ho et al. 1997a). Since Balzano's individual Balmer decrement values are rather uncertain, her luminosities were dereddened using their median Hα/Hβ ratio, which corresponds to E(B−V) = 0.62 mag. The L(Hα) values for the disk H II regions represent the average luminosity of the three first‐ranked regions as tabulated by Kennicutt, who only corrected for Galactic reddening. We dereddened the luminosities by E(B−V) = 0.29 mag, the median internal reddening of our compilation of disk H II regions.