Hello PoohCat21,

A hermie plant means that it carries both sexes. This can cause problems for growers who are not interested in seed production because the plants will pollinate themselves. As far as light leaks, I have never experienced a plant turning hermie from it but I did notice a much longer flowering period, than with total darkness. As far as photoperiods go a 12/12 light cycle will induce flowering. For veg, I run 24 hr light.