Growing cannabis indoors has many advantages, besides the apparent fact that it is much harder to have your crop found, you can control the ambient conditions just exactly as you want them and get a guaranteed good plant.
Plants grown indoors will not appear the same as their outdoor cousins. They will be scrawnier appearing with a weak stems and may even require you to tie them to a growing post to remain upright, BUT THEY WILL HAVE AS MUCH OR MORE RESIN!
You should be growing weed in a growing room, you should put tar paper on the floors and then buy sterilized bags of soil form a nursery. You will need about one cubic foot of soil for each plant.
The plants will need fresh air, so the room must be ventilated. (however, the fresh air should contain NO TOBACCO smoke.)
At least eight hours of light a day must be provided. As you increase the light, the plants grow faster and show more females/less males. Sixteen hours of light per day seems to be the best combination, beyond this makes little or no appreciable difference in the plant quality. Another idea is to interrupt the night cycle with about one hour of light. This gives you more females.
The walls of your growing room should be painted white or covered with aluminium foil to reflect the light.
The lights themselves can be either bulbs of fluorescent. Figure about 75 watts per plant or one plant per two feet of fluorescent tube. The fluorescents are the best, but do not use cool white types. The light sources should be an average of twenty inches from the plant and NEVER closer than 14 inches. They may be mounted on a rack and moved every few days as the plants grow.
The very best light sources are those made by Sylvan and others especially for growing plants (such as the go lug types).