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post #3 of (permalink) Old 06-12-2019, 06:56 AM
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carl750's Avatar
Join Date: Jul 2006
Location: Galena, Illinois
Posts: 879
Unfortunately you cannot rely on what it says on the package. I recently tested Osram (Sylvania in USA) 7528 Long Life listed as 21/5 and 7528 (regular) listed as 25/5. When tested at the prescribed (Osram literature) 13.5 volts they both came out to be 26 watts.
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