Yeah. Give the OVD, OVX, and OVZ the boot and let the OV15 and OV25 back! I don't agree with using tilted optics with FCO though. It doesn't look good. So I guess the OVG/H and OVY/F would be staying if it were up to me.
Two of the failures where lamps, the other was the PC blowing out of the receptacle. 250 watt 115s seem to have a lot of early failures too, of the five installed at the intersection your lights came from two are already cycling.
@ Niall and Joe, the Cooper OVZs here don't cycle badly. Your areas are most likely using garbage lamps. I was referrign to the current Coopers being unappealing, not crappy performance. If Cooper starts making tons of OV15 and OV25, those lights will be just as bad as the current ones, but they'll at least look nicer.
area seemed to have switched to AEL recently.