First of all for anyone using this, It’s a blueprint that contains a Directional Light and Sky Light actor, so you should delete any others in your scene or start with a blank scene.
Secondly, the Directional Light is set to 150000 lux. This makes the light appear super bright as you’ve noticed. We have a Project Setting that extends the Auto Exposure Luminance (search for Extend default luminance range in Auto Exposure settings) so that lights can use physically accurate values.
With that in mind, you can enable that setting in the project settings and restart the editor OR you can change the directional light’s intensity to be a lower value similar to what it has been in the past; around 5 to 10 lux.
I hope this helps!