A soft round light with blend mode settings Add with Invert that removes brightness from underlying content. Use it to darken areas of the HDRI map.
Please note... you can often get better more controllable results switching to Amplify blend mode, with Invert on.
Here are the key settings for a Dark Light:
Mapping: 3D
Width: 20
Height: 20
Blend Mode: Add, with Invert option on
Content: Bulb
