def fix_lens_light_tag_from_fix_lens_light(fix_lens_light):
if not fix_lens_light:<EOL><INDENT>return '<STR_LIT>'<EOL><DEDENT>elif fix_lens_light:<EOL><INDENT>return '<STR_LIT>'<EOL><DEDENT>
Generate a tag for if the lens light of the pipeline and / or phase are fixed to a previous estimate, or varied \
     during he analysis, to customize phase names.

    This changes the phase name 'phase_name' as follows:

    fix_lens_light = False -> phase_name
    fix_lens_light = True -> phase_name_fix_lens_light