I think you'll be fine vegging under your current set-up, as long as the plants don't get to big.
The growing conditions for tomatoes is very simular to growing cannabis, if anyone asks say you want to add supplemental lighting to your tomatoe grow.

For flowering you should purchase a HPS and use your floro's for side lighting.

You will get amazing crystal production from using a more balanced spectrum.
420Somehow Reviewed by 420Somehow on . Two Questions, some answers? 1. What are HPS lights REALLY used for, i don't have a credit card...and don't want one...and i don't put my money in banks. fuck, that! sooo...a local electric store has a nice ballast...that holds both hps and mh. the bulbs i can get at lowes, both 400 wats. so, what do I tell them I need it for?...i don't wish to share my business with them. 2. at the moment, I have a CFL light from petco that is 65 K. Two bulbs, 6500 K blue acetinic light...and a 65 w cfl..just regular...in Rating: 5