Answer: A.
Answer analysis:
This question is about physics-related common sense.
Step 1: Analyze test points
Generally speaking, the working voltage of LED is 2-3.6V, and the working current is 0.02-0.03A, that is, LED generally uses a low-voltage power supply. Option A is wrong, so choose "no" for this question.
Step 2: Analyze options
Option B: LED lamp is an electroluminescent semiconductor material chip, which is cured on the bracket with silver glue or white glue, and then connected to the chip and circuit board with silver wire or gold wire, and sealed with epoxy resin around to protect the internal core wire, and finally install the shell, so the LED lamp has good seismic resistance. At the same time, it has the characteristics of longevity, and the life span can reach more than 100,000 hours. Correct, choose "no" for this question, and exclude it.
Option C: The energy consumption of white light LED is only 1/10 of that of incandescent lamp and 1/4 of that of energy-saving lamp. Correct, choose "no" for this question, and exclude it.
Option D: One of the advantages of LED is its high controllability. As a light-emitting device, LED can control brightness by changing the current flowing through it, and can also change and adjust color by configuring LEDs with different wavelengths. Correct, the answer is no, so it is excluded.
Therefore, the answer to this question is A.