My lights switch on by it self, I don't know how to resolve this issue

I am having a challenge with my strip light
I don’t know how to sort it
I have tired to understand why it happens but have failed.

My strip light keeps on turning on by it self.
I have kept motion sensor for it and have set it
After 2 mins if no motion it should switch of it self.
It does switch off but after 30 seconds it switches on it self again without even any motion and doesn’t switch off again.
Pls help me resolve this problem