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Old 04-28-2020, 05:43 AM   #1
Junior Member
Location: UK

Join Date: Apr 2020
Posts: 1
Lightbulb i5/7 (P5/7) Nomeclature

Why is i5/7 (P5/7) named 5 and 7?
I understand i5/P5 are on 5' end, so perhaps it makes sense to name it 5, but what about 7? Or it must be some other reason behind it if it doesn't make sense for the 7? Is it to do with the restriction site- why?
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