i just bought a vintage louvered light fixture, it takes 2 f40t12 bulbs, it has a uneversal therm-o-matic rapid start ballast in it and it replaced a preheat ballast, i know because it has holes for starters, i have some tombstones with starter sockets so that is no issue, i looked on ebay and could not find a preheat ballast for it, but did not know exactly what to look for, what should i look under?
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