We present deep composite luminosity functions in B , g , V , r , i and z for six clusters at 0.14 < z < 0.40 observed with the Hubble Space Telescope Advanced Camera for Surveys .
The luminosity functions reach to absolute magnitude of \sim - 14 + 5 \log h mag .
and are well fitted by a single Schechter function with M ^ { * } _ { BgVriz } = -19.8 , -20.9 -21.9 , -22.0 , -21.7 , -22.3 mag .
and \alpha \sim - 1.3 ( in all bands ) .
The observations suggest that the galaxy luminosity function is dominated by objects on the red sequence to at least 6 mags .
below the L ^ { * } point .
Comparison with local data shows that the red sequence is well established at least at z \sim 0.3 down to \sim 1 / 600 ^ { th } of the luminosity of the Milky Way and that galaxies down to the regime of dwarf spheroidals have been completely assembled in clusters at this redshift .
We do not detect a steepening of the luminosity function at M > -16 as is observed locally .
If the faint end upturn is real , the steepening of the luminosity function must be due to a newly infalling population of faint dwarf galaxies .