Philip, when do you actually plan to put the tomato plants outside? I like to start mine about 6 weeks before planting, definitely no more than 8 weeks, because in my experience they get way too big to keep under the lights by that time.
For the record, my old T12 shop lights do raise the temperature significantly for my plants; when the temp in our shop is around 55-60F, the temp inside the plastic-enclosed plant shelf setup will be in the mid 70s (with four 2-light fixtures turned on).
