We also
found that early age acceleration of growth in the GL
birds continued when they were shifted to BL. After
switching to BL, there was a further increase in both
growth rate and BW. Changing illumination from blue
to green at 20 d also enhanced growth compared with
WL- and BL-treated birds. In agreement with our data,
broilers (Wabeck and Skoglund, 1974) and quail (Phogat
et al., 1985) raised under blue or green fluorescent lamps
gained significantly more weight than those reared under
red or white fluorescent lamps, but feed conversion and
mortality were not affected.