The fixtures that are giving me problems are all 8' High Output two bulb fixtures. Between the two barns there are a total of 14 HO fixtures. There are also 5 four foot shop lights with the 2 pin bulbs. Humidity doesnt seem to bother the four foot fixtures, just the 8' HO fixtures. Cold bothers the 4' but I can live with that.
The HO fixtures are all well grounded and there is no starters in them. I know the two fixtures I replaced the ballast in now have electronic ballast. I dont think the old ones were. The new ones dont seem to be any better however.
The ones I replaced the bulbs in, the bulbs came from a new box but it was purchased in a bulk purchase several years ago. So the bulbs are NOS I guess you could say.
The HO type end is not going to be easy to wipe down since the contacts are somewhat recessed. If I use contact cleaner and compressed air , do you think that would help?
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Today's Featured Article - The Nuts and Bolts of Fasteners - Part 2 - by Curtis Von Fange. In our previous article we discussed capscrews, bolts, and nuts along with their relative hardness and thread sizes. In this segment we will finish up on our fasteners and then work with ways to keep them from loosening up in the field. Capscrews, bolts and nuts are not the only means of holding two parts together. When dealing with thinner metals like sheet tin, a long bolt and
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