Grow lights, suggestions needed

[windsng225]

Hello everyone,
I am new here and need to ask for your advice. I want to set up a growing shelfing system in my basement in February for my seedlings. I need to know what I should buy for a lighting system. I do want to get the 48" florescent light tubes and want to know if I can buy the (I don't know what you call them)thing a ma jig - that you plug them into, those things that are adjustable as the plants grow. Can I purchase them cheep or do I have to pay a lot of money for them? I'm on a fixed income and it's hard to do these things when it involves money. My son said he would build me something with 3 shelves, but need to purchase that (fixture?)?
I thank you in advance for any information you can give me.
joyce