You can download it in HDR or EXR format (or both of them).
There is also 2 version of it. Color and B&W. This is usefull to control the saturation of the light. I use an Blend material for this !This source light is the more realistic that you can use to light your scene without spending too much time twicking the lights settings. Resolution : 3000/1500
Depth : 96bit
Format : Full spherical (360/180)
Extension : HDR and or EXR
Version : Colored and Black & White | 
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