Ist eine Zitronen-Einzelzelle für eine LED geeignet? - Reaktion auf Fakevideo

Why can't a galvanic cell made from a single lemon power an LED? Or can she?
A practical experiment and reaction to a video that shows how it is guaranteed not to work.
Link to the original video: Charge LED light with Lime

0:00 - Introduction
1:14 - Reasons against it
1:44 - Requirement for galvanic cells
3:32 - The voltage problem
3:58 - The power problem
4:42 - Suggested solutions
9:19 - Let's go!
11:23 - Practical test
12:20 - Evaluation