I grow my own vegetables every year from seeds as simple as possible. I use the natural light coming through an east-facing window. I use the pots my neighbors save for me from the plants they buy. When my plants grow a little and start to look stringy, I repot them in a larger container. Often I use discarded plastic cups from a party.
Repotting is an import process in growing your own vegetable plants. I always plant the thin stem way down into the dirt leaving the foliage just peaking out. This will help develop a nice root system for the plant. This feature comes in handy during a hot summer.
With all the added nutrients in the soil my plants they start to grow studier stems and grow quickly.