Below are some spectra I took using the CCDSpec spectroscope on my Sky Watcher Equinox 120mm telescope.
Capella (spectrum as comes from spectroscope and then plotted using RSPEC):
Comparison of spectrum of Capella with that of the Sun (using Sun as reference spectrum here):
Spectrum of Moon:
Comparison of the spectrum of the Moon and the Sun (Sun is reference spectrum here), demonstrating that they are in fact the same spectrum and hence that the Moon is a reflected spectrum from the Sun (as it is has not atmosphere):