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FYI TIP –  Most default lights are set to IES (Illuminating Engineering Society) which strives to give accurate lighting results.

You can change to either Spot or Point lights to create your own final Rendering results by clicking Edit (Lights) and then selecting the light source you want to customize. 

In the attached the left recessed light, set to ‘yellow’ has the default IES setting.

The center ‘white’ light is set to SPOT.  (cone shaped light-hard edge)

The right ‘blue’ light is set to POINT. (mulit directional light – soft edge)

By adding new custom light sources, that you have developed, you can get more interesting renderings. 

Jack

zimmerdesign.com