too true, as latewood said. good light is good light.

you have been misinformed. i know that greg green's bible has that as a typo...

hps is good for all stages, but has been said to increase male count if used in veg. hps is great for flower.

mh is excellent for veg. good for flower, you get less stretch, and denser buds, but the yeild is considerably less than with hps.

a combination produces the greatest overall effect, iml. ie, i was using a 400w mh with a solarmax gold bulb (more red than standard mh) and a 1000w hps. no fluffy buds, all dense, and a very good yeild.

sorry for missing you...