  Lyman-alpha emission from galaxies should be suppressed completely or
partially at redshifts beyond reionization. Without knowing the instrinsic
properties of galaxies at z = 6.5, this attenuation is hard to infer in any one
source, but can be infered from a comparison of luminosity functions of
lyman-alpha emitters at redshifts just before and after reionization. We
combine published surveys of widely varying depths and areas to construct
luminosity functions at z=6.5 and 5.7, where the characteristic luminosity
L_star and density phi_star are well constrained while the faint-end slope of
the luminosity function is essentially unconstrained. Excellent consistency is
seen in all but one published result. We then calculate the likelihood of
obtaining the z=6.5 observations given the z=5.7 luminosity function with (A)
no evolution and (B) an attenuation of a factor of three. Hypothesis (A) gives
an acceptable likelihood while (B) does not. This indicates that the z=6.5
lyman-alpha lines are not strongly suppressed by a neutral intergalactic medium
and that reionization was largely complete at z = 6.5.
