I just saw this thread, but I have used every size of the Pioneer T5 System.
You can get orange glowing bloom bulbs and the daylight vegetative bulbs.
Since you have the 8 tube version you will want to use 6 or 7 daylight tubes and 1 or 2 bloom tubes in the same fixture for vegetative (green leafy growth).
For the bloom phase of plants like tomatoes, strawberries, and peppers, you will want to use all 8 orange bloom tubes or add in one or two day light tubes.
The thing about the Sunleaves lights is they don't get extremely hot. The 8 tube fixture gets hotter than the others because there are so many tubes, but the plants can grow up to 2-3 inches away without burn. If you use them in an airtight box you will want one or two circulation fans and one strong inline exhaust.
The 8 bulb fixture should be able to grow tomatoes but there is a trick to it. You have to reset how you think about growing tomatoes. Like Hydroguy said, the fluorescents do not penetrate deep into the canopy. You want to get a short variety of tomato and send them into the bloom phase before they get really tall.