I do maintenance at a large complex.(11 building) Over the past few years we have started replacing our double 90w flood lights with Heath/Zenith SL-5676 high pressure sodium lights from Home Depot. Almost always we soon get an on/off cycling happening soon after but it seems to solve it by replacing the bulb. I have not seen any other reference from other people about this so I wonder if it something I am doing. I have one of those fixtures doing it again that went through that process about 1 1/2 years ago. We have had 150 w sodium lights last 5 years or so.
The fixtures are photocell activated and I wonder about that but we have had the same results in many locations where I am sure other lights aren't an issue. I taped over the cell once and had same results. The lights are on circuits with other flood and sodium lights with current ranging from 9 to 12 amps. All circuits are controlled by mechanical switching timers. The units has silver (or aluminum?) wire which I am marretting to a copper wire. I usually put on a paste to protect the contact. Any ideas.
The fixtures are photocell activated and I wonder about that but we have had the same results in many locations where I am sure other lights aren't an issue. I taped over the cell once and had same results. The lights are on circuits with other flood and sodium lights with current ranging from 9 to 12 amps. All circuits are controlled by mechanical switching timers. The units has silver (or aluminum?) wire which I am marretting to a copper wire. I usually put on a paste to protect the contact. Any ideas.
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