Most Walmarts carry GE but the brand does not matter.
Just get some cool white cfl bulbs and some clamp lights. I bought some clamp lights just last night for under $6.50 at Walmart.
As for the bulbs get the highest wattage you can. What is just as important is the kind of bulbs.
Get cool white for vegging and soft light for blooming. Look on the package for lumens and kelvins, some packages will not show these, and they are more important than wattage really. You need a certain amount of lumens in the grow area.
Here is why.
The soft white is 2700k and could be lower if you can find them, but most likely you won't at Walmart or Home Depot. I found these at Home Depot.
This is what they are packaged in at the store.
You should do some reading in the GrowFAQ's area too.