I'm also a first 4 weeks under MH, second 4 weeks under sodium grower. I've run pure halide start to finish and pure sodium start to finish and there is a small difference but like everyone has already said, not really a yeild difference. Currently, the halide for the first 4 weeks really controls the stretch and plant growth but the 400w sodium is my all time favorite bulb for flowering so I use it for the last 4 weeks. Something about the 400 sodium just gets the buds super sticky. The halide tends to make them a little more 'frosty' but the sodium makes them sticky, bigger trichs, more oily plant. If I had to choose one or the other, it would be sodium.
Strains grown: Afghani #1, Big Bud, NL #1, Shiva, God, Chronic, Skunk #1, Sensi Skunk, Jack Herer, Hashplant, King, Champagne, Super Silver Haze, Neville's Haze, Bubblegum, Blueberry, UBC Chemo, Roadrunner, Romulan, Fruity and RENE!
Rene Soil Grow