I don't remember where I read this, it may have been on this site, but somebody grew some nice bud and got good yield on the cheap. He used like 5 or 6 led bulbs that shine straight down reg screw in type and he said he got them at a dollar store. Anyways google growing weed on the cheap I am sure you will find it. Good luck and keep us updated.
That pretty much described my first ever grows. CFL lightbulbs on a 2 way splitter connected to a plug in shop light from Home Depot. It actually produced almost an ounce on a plant. I had 3 sockets, so 6 light bulbs total and I kept them about 8" from the tops of the plants.
I was just telling someone else, getting experience growing the plant is good. The more you do it, the more you have seen, will understand and know the requirements of time and patience. As you get more and more into it, your equipment quality will catch up with your appetite to grow. I encourage people to go for it.
For the flowering phase, you will need to find a place of absolute darkness. No light under the door, from the crack in the corner, a bright touch screen.... nothing. That means an enclosed area, which will have stagnant air if you don't have a fan moving it around inside. That is critical to avoid mold and heartbreak. Something that can measure your temps and humidity will be helpful because you really want to be able to control your environment. Environment, lighting and genetics are the 3 keys to a good harvest.