I didn't commrnt on your other post,but if it is a HPS light,they are very-very touchy after a few years use to any surge.The 70s and 100s not so much,but the 150s and bigger are super bad.I have 400A service to the house and another 400A service to bins and buildings(same Trans.100KVA)and had HPS lights(3-4 yrs old) cycle when something kicks on on the other meter.I have to replace bulbs(3-4yrs)and sometimes the whole light after 5 yrs or less.So if they are HPS lights look at their age first.Good luck and hope that is all it is.
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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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