OptionaldatetimeThe current date and time of the simulated sun. It is a number representing the number of milliseconds since 1 January, 1970 UTC.
OptionaldirectIndicates whether to show shadows cast by the sun.
OptionaldisplayUTCOffsetUTC offset in decimal hours. Not to be applied to datetime for sun position, only to adjust display of datetime in UI. If displayUTCOffset is null, offset is calculated for the current location (approximate only).
The type of lighting.
Object containing information for the sun lighting type. The position of the light is set to the sun's location.
See https://developers.arcgis.com/web-scene-specification/objects/sunLighting/.