What the boys are telling you is that a hermie, is a plant that is male and female at the same time, this is usefull for guerilla farmers in south america who have acres of plants, and they cant be taking care for each plant to be female...
Anyway for a indoor grower, its not usefull at all, because it will produce seeds, and the plant will have a lack of potency, plus the seeds wont be stable...

Remember that feminized seeds are chemicaly altered so the seeds that they make might be bizzare and give you weird plants... (im not preatty sure) but ive heard this.

About the light it was good just dont put it very close