Metal Halide vs High Pressure Sodium bulbs

I read an article in High Times or Cannabis Culture yesterday and the guy talked about how he used Metal Halide all the way through flowering. I had always thought High Pres. Sodium was the way to go in flowering, just from what I'd read before. Considering that I'm planning on moving up in the world from CFLs to HID soon I want to know if anyone has tried both of the types of lights on separate occasions and which one they think was better, both in terms of yield, difficulty to work with, and power consumption. Thanks guys.

You are right high pressure sodium is better for flowering than metal H. High Pressure has more yellow red autumn spectrum of light. where Metal H is more like summer spring type light. With that said there are so many conversion bulbs that provide the best of both worlds. If it was me i would buy HPS and if i thought i needed more blue than find a bulb that has a more blue light. Both are good both get very hot and need venting. Both will produce very good bud as long as you grow it right.
for reference i have a 600 hps and 250 metal H light i use both but that is not a must. Also both have digital ballasts so they can ignite and bulb almost.
peace nate

thanks guys, quite helpful.

somebeech, you say you got an oz off that plant with the mh, just curious but how long was it flowering, and whats the yield like for you plants under hps? when your doing the perpetual harvest model are you getting as much yield per harvest or just a lot more harvests?