"George Patterson" wrote in message news:TMEJi.915$Wo4.18@trnddc03...
I have one of the Orbit fixtures with four daylight bulbs and two actinics. One
of the daylight bulbs is behaving erratically. It does not come on when the
others come on in the morning. It may or may not come on later in the day.

I replaced the bulb about 6 weeks back. For several weeks after that, it would
come on when the other three came on, but then it got erratic. The one which it
replaced was less than a year old.

What's your guess as to the problem?

Socket?
Wiring?
Moisture?

Hard to guess.. I would try to measure.