It's too aggressive, some people argued the ability is not Dark Side for sure, but it should be used very carefully, with such limitation, I don't think it's very valuable to Jedi.
Just like Force Choke and Force Crush, jedi use it too, but if they use it too much it's easy to lead them to the Dark Side because it's too aggressive.
Sith's Force Lightning is a bit different, it's composed of hatred and can drain being's life forces.
Correct. Force Lightning's power is very contrary to the Jedi beliefs. However, some Jedi refuse to ignore its power and try to hone it to serve the Light. Many Jedi fail to harness it without falling to the Dark Side, but those who can demonstrate their willpower and devotion to the Light.