Its common for OVX to have premature cycling....in 150 watts and up.....same goes for other Cooper fixtures, due to reflector design......we have lots of OVX in state of MD.......I've noticed highways get group relamped so its less common for them to cycle...and they work on them often anyway....but traffic light interscetions on the other hand....gets cyclers....often!
Apparently the Design of Cooper Reflectors shines Excess IR Radiation Back at the lamps Arctube...which of course would make it run a tad Hotter than Normal which could make it Cycle Earlier....i think thats it...and thats my Theory.
Theres a 15KM stretch of 400 watt OVXs here, they where all relamped (after me harassing the city for about two months) back in March '10 and many are already starting to cycle I wonder how long until I'll have to start harassing them again to do a group relamping
Here the state waits for the majority of the lamps to be dead before doing a replamping. By then most of the starters and some ballasts are dead from operating expired lamps, so they end up replaceing the fixtures instead. RIDOT is too lazy to fix the starters.
Last night, it was out. Today I went to fix it and it is more than a bulb or igniter. I took it down and may end up putting a GE M400R2 FCO in its place.