What is the best light to grow plants in besides for sunlight?

Question by Jono: What is the best light to grow plants in besides for sunlight?
I want to try start growing plants indoors, and wondering what kind of light would be best suited to aid the growing process? If anybody can post some links as well would be greatly appreciated! I would like to try and build my own grow lamp, and need to know light frequency, and how high above the soil/plants and such things I would need. Would like to try grow different fruits, herbs, and trees. Thank you.

Best answer:

Answer by KARL
infrared

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