Interesting Light Bulb Experiment Using Pencil Lead

It is an interesting experiment by connecting the pencil lead to the battery with crocodile clip.
it is found that 4 X size D battery and 0.5 HB pencil lead provide the best result.

[@DIYbama]

[@MarynaMoolman]

Is it possible to do this using a 9V battery?

[@monkeh3612]

Yes

[@monkeh3612]

He is using four 1.5 volt batteries in series which is equal to 6 volts

[@monkeh3612]

So if you use a 9 bolt battery it will light up brighter

[@monkeh3612]

If you use a thicker lead of course

[@georgieippolito9924]

try using carpenter pencil lead because it's much thicker and will probably stay lit longer. also what's the name of the song? I wanna make a techno version

[@trishakamath8146]

can the light reappear again using the same thing again

[@karynahferreira5507]

can anyone tell me what the controlled variable is?

[@anthonymacias441]

I would think it would be the pencil lead.

[@Randy-pj9ht]

hola sexto grado