How to Decrease global light intensity?

After a few seconds light slowly increases its intensity, and I found in this some dazzle effect. How disable this feature, and what section of lightn params is it?

What’s your problem specifically, is it light slowly increasing the intensity or is it the high light intensity?

slowly increasing, yep…

That’s because of the Auto Exposure. Uncheck the Auto Exposure option in Project Settings>Rendering.
Then Insert one post processing volume in the scene and Adjust the Max & Min Brightness until you get the satisfied result.

Thanks a lot. Works.