Try 1000W Halide with 400 sodium. You'll see the bud difference in yield, taste,buzz favoring the plants nearest the halide.
SanClem is a guru. His main point is that halides have more USABLE light for plants and that they grow more weight and much tighter buds. He has MUCH data from his own tests to prove it. Ever see his plants grown JUST with flourescents???(BLUE spectrum).
Halide is the way to go, much more pleasant to work under also. ALWAYS use extream caution with halides..they are VERY delicate. Use gloves when handling halides,do not put undue pressure on them. Sodiums you can almost throw against wall and it won't break.