Mounting PFO Double Ended Pendants

[Werbo]

Ready to mount some PFO 250W double-ended pendants over my 4X2 ft. 120G.
I know single-ended bulbs go front to back (the width of the tank). Is it the opposite for double-ended? Or, is it the same mounting for double-ended pendants as single-ended?
Picture is worth a thousand words. In this picture are the pendants mounted correctly.

http://www.reefkeeping.com/issues/20...es/TOTM723.htm

Thanks,
TW