We have used galaxy counts obtained at 2000 angstrom down to a magnitu
de of 18.5 to calculate the ultraviolet integrated light of galaxies.
The calculation is based on models developed to interpret the galaxy c
ounts. Because of various sources of uncertainty, the extrapolated val
ues lie in the range 40 - 130 photons cm-2 s-1 angstrom-1 sr-1. This e
xtrapolated intensity is comparable to the extragalactic ultraviolet b
ackground estimated from direct background measurements, demonstrating
that the integrated light of galaxies must be a significant contribut
or to the extragalactic ultraviolet background.