| How to identify the date of manufacture on GE bulbs from 1980 to the present by batch number?
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I've been collecting light bulbs since I was 2 years old and I've been collecting them ever since.
由于我来自中国，所以英语不精通，大部分内容都是翻译的，所以可能不通顺，请大家谅解
Note:
Bulb base in China:E12(CES) E14(SES) B22d(BC) E27(ES) E40(GES)
