Here are some pics that might help with the tips heh

for 6 weeks old they seem sort of small, just judging by some other pics i saw on the forums of same age plant.

So I think I will go out and grab a 150w HPS this week. When I get it should i replace it with the fluorescents above the plants? Or should I just replace it when they go into the flowering stage?

also once i transplant to 5 galon buckets, will 1 HPS lamp cover enough area for all 3? (assuming i still use some of the fluoro's around the sides) Just wondering because they seem pretty small when i looked it up.