When your vegging your plants, you really don't need much light at all.
A couple of shop lights with 40 watt fluorescents are sufficient for seedlings, vegging, mothers, and clones.
When your vegging with fluorescents your plants will grow no problem. You just have to keep the bulbs extremely close to the tops of your plants. Your plants will become tall and lanky. But with some careful pruning and training you can train your plants to becoming more bushy.
It will be a 2-3 months anyways before your plants will be even ready to
put into flowering status to produce bud.
During the vegging stage, caring for your plants will give you the experience that you will need for the flowering stage. Plus it will give you some time to save your money to get a powerful enough light to produce bud.
You will not produce bud with 40 watt flourescents. You might get the beginning stages of bud. But the flowers will never evolve into something that will have a significant amount of THC.
You'll need something a bit stronger. At least a 400 watt HPS (High Pressure Sodium) Bulb. If you shop around you can find a decent light setup for less than $200 including the bulb.
Becareful when buying these lights. People out there will try and sell you a setup with a HPS bulb, Where the bulb will technically will be a HPS bulb. But the bulb will be a shitty HPS street bulb that you can buy at any HD for $15. This bulb is made for street lights not for plants.
You need a bulb that has a high lumen output, at least 55,000 lumens. Also it's very important that it has at least a 30% blue & red spectrum.
These HPS bulbs that are made for plants, generally sell for about $75.
Good Luck.