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It's not just tv ... I once owned some tire/auto centers. Our alignment machines would go thru bulbs like crazy. Nothing special about the bulbs except the bases were custom made just for the manufacturer.
This prevented anyone from locally and cheaply repairing the units. Instead we had to pay for, and wait for, a factory service tech that had a minimum hourly charge for time and travel as well as bulbs that were outrageously priced for what they were.
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