Horizonal or Vertical Bulb?

Need to get some info/opinions on whether to go with a vertical bulb or horizonal bulb? Looking for best light distribution in a 48" x 48" x 6' area.

Ull get the most coverage vertical

that small of a space it wont matter much either way for coverage.
you could go a 42" parabolic if you have the ability to cool it enough without an air cooled.

I disagree, I don't think any of the vertical reflectors can compare to the horizontal.

For best light coverage use a horizontal with hanging cfls or something. But in a 4'x4'x6' I would look into a 600w HPS/Mh setup with a cool tube. And read into lst since you will have height challenges. Unless you plan on only small indicas.