This bulb starts glowing at well under 1.0 volts. Works fine for the science fair project "Ultra-Simple Generator" -bill b, amascicom
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Fantastic lamp!
Reviewer: A viewer
from HOUSTON, TX USA
This lamp is great! It is tiny. It is what is called a "grain of wheat" bulb. However, I wish the voltage was a little higher (5,6 volts).
I still love it!!! KD5BIH
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