On the more technical side of growing herbs, and plants in general. They make lights called LED Grow Lights, which only use certain colors of light to help promote plant ground. But these can be expensive, so a cheaper, though not as affective, alternative is to use colored filters with lights.
From my research on the subject, orange and red light (red being better) works best with plants and herbs in general (as well and fruit bearing plants), while blue and purple work best with vegetables.
I purchased a cheap LED light panel online, and while it isn't great quality, it still works well. I've only been able to test it on tree seeds (jacaranda and empress), but it did seem to cut the seeds germination time in half.
I ordered seeds for mugwort (through amazon), which will be my first herb, so, once they arrive, I'll post on whether or not it helps that much with herb growth.