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One of the Two Wrap Lights
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Here's one of the two F40T12 wrap lights in the basement. The rest of the lights are 4 lamp F40T12 troffers. Those 4 lamp T12 troffers are a PITA to relamp. this wrap sports two cool white 40w Altos. The full wattage Altos are very good. They last much longer than the 34w ones.
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btw if this gets turned on and off a lot with a LPF ballast its gonna kill those Altos rather fast as the cathodes aren't durable
funny thing is some LPF ballasts will light F34 lamps brighter and overheat versus dimmer with F40 lamps and not overheating
how does it light up? like slow ish with no flicker? if so its LPF
HPF usually does a bit of flickery start up
and yeah i love that old buzzing ballast sound
oh and are the troffers brighter? troffers always have HPF ballasts, that would be the dead giveaway