  We present a survey of mass profiles and mass-to-light ratios of eight
typical galaxy clusters at a common redshift (z ~ 0.2). We use weak
gravitational lensing as a probe because it is unique in avoiding any
assumptions about the dynamical state of the clusters. To avoid bias toward the
rare and spectacular clusters that are easy targets for lensing work, we
selected an ensemble of much more common clusters with moderate X-ray
luminosity. Although the survey is still in progress, two conclusions are
emerging: (1) within a cluster, mass follows light very closely on the angular
scales that we can measure, $0.2-2h^{-1}$ Mpc, and (2) there is a significant
cluster-to-cluster scatter in mass-to-light (M/L) ratios despite uniformity of
observing, reduction, and analysis procedures. We also derive an estimate of
$\Omega_{matter}$ based on extrapolation from the mass properties of these
typical clusters. Finally, we discuss the discovery of other clusters in our
fields through their lensing signal.
