  We consider light propagation above the light line in arrays of spherical
dielectric nanoparticles. It is demonstrated numerically that quasi-bound leaky
modes of the array can propagate both stationary waves and light pulses to a
distance of hundreds wavelengths at the frequencies close to the bound states
in the radiation continuum. A semi-analytical estimate for decay rates of the
guided waves is found to match the numerical data to a good accuracy.

Optics