I'm a first-time grower, so I'm definitely no expert. I am using 7 55w CFL's and 4 32w t8 fluoros and I can't speak for yield, because I don't know what is normal and I know it varies by strain. I am 6 1/2 weeks into flower and my buds are just as dense as the ones I get at the dispensary. If I HAD to guess yield, I would say about 1/2+ oz from each of my trainwrecks and between 1/4 and a 1/2 off my white widow and OG bubblegum kush. The buds are frosty too and smell wonderful!