Is it obligatory to turn off the electric light at night, just as one does with fire?

Question:
Many people leave the electricity—meaning the light—on all night long. Is this considered extravagance?

Answer:
In any case, some do it out of ignorance, and some think it is necessary at night. One gets up, another comes down, and another goes to the bathroom, so they see that the light must be on. They believe that, praise be to Allah, it is safe and there is no danger, and generally there is no danger. However, caution is the practice of the Sunnah, so turning it off is more cautious and better in accordance with the Sunnah. Otherwise, generally there is no danger like that of a burning fire.
Q: Is the light like fire?
A: It is easier and lighter.
Q: Is it better to turn it off?
A: There is absolutely no doubt; it is better to turn it off.