i forgot to add that the fixture that came with the tank has 4 30w t8s in it. i guess i will be using these as well. the current bulbs just say "eclipse full spectrum". do i need to replace these? if so, whats a good bulb? the plant bulbs seems to be around 3000k, and i dont think i want a redish color light. also are t-8s and t-10s swappable in the same fixture? i also think that maybe 2 wpg will be enough for what im trying to do. so once i replace the bulbs i have now, i will already have 120 watts, so i just need either a 48" or two 36" fixtures providing 100-150 watts, right? thanks