We are finally done with the painting! Now we have been working with the lighting of the crop. We have learned some electrical safety instructions during the process. One of the tools we used is called Amplified electronic tester. It is also informally called electrical tester pen, test pen, or voltage detector, that rely on capacitive current only, and essentially detect the changing magnetic field around AC energized objects. This means that no direct metallic contact with the circuit is required. The user must touch the top of the handle to provide a ground reference (through stray capacitance to ground), at which point the indicator LED will light up or a speaker will buzz, if the conductor being tested is live.