Both of 'l' and 'L' are acceptable as unit abbreviations for litre: https://en.m.wikipedia.org/wiki/Non-SI_units_mentioned_in_the_SI https://en.m.wikipedia.org

Both of 'l' and 'L' are acceptable as unit abbreviations for litre: https://en.m.wikipedia.org/wiki/Non-SI_units_mentioned_in_the_SI https://en.m.wikipedia.org/wiki/Non-SI_units_mentioned_in_th...