  We present results of broad band {BVRI} observations of a sample of galaxies
with a low surface brightness (LSB) disk and a bulge. These galaxies are well
described as exponential disks and exponential bulges with no preferred value
for either scale length or central surface brightness. The median {B} band disk
scale length is 12.6 kpc (H_(0) = 75 km s^{-1} Mpc^{-1}) which is much larger
than scale lengths of typical (disk dominated) LSB or high surface brightness
(HSB) galaxies. Furthermore, the disk and bulge scale lengths are correlated,
suggesting a coupling in the formation. Bulge dominated LSB galaxies are
observed to be redder than disk dominated LSB galaxies and their bulge-to-disk
ratios are increasing towards redder wavelengths. We find colors that are
comparable to or bluer than HSB galaxies of the same morphological types. Bulge
dominated LSB galaxies are therefore not faded HSB galaxies with no current
star formation. We find that bulge dominated LSB galaxies fit in with the
general trends defined by the HSB galaxies. The properties of these bulge
dominated LSB galaxies show that LSB galaxies do not just come in two
varieties. They cover the entire range in optical and morphological properties
between late-type disk dominated LSBs and giant Malin-1-like LSBs. LSB galaxies
thus also form a LSB Hubble sequence, parallel to the classical HSB one.
