Simple here...

You have approx. 5 sq. ft. use the following:

Lumens....PER SQ. FT.

2000 required to sustain stem and a couple of leaves. Barley.
5000 adequate lighting to grow tomato plants
7000+ Optimal Lighting to grow really nice tomoato plants

If you are serious about growing, consider an MH bulb used in flower stage with an HPS is an excellent source of UV-B rays which the plants will use to make stronger THC....but you need to keep the HPS dominant so use HPS 2:1 with MH.