what type of led do i use for the supercharged lemon i used a 1.2 v and i cant get it to work? Answered

Your LED is not likely to be the problem in the supercharged lemon project.

It is more likely a problem with the joule thief circuit or with the electrodes. Are any of the electrodes shorting out inside the lemon?

A multimeter would be handy here. Ebay Buy It Now has them for $7, including shipping.