Illuminate large spaces, spacious halls or underlit rooms as main light. Flash photography and clarification of distant objects and people. For sports shots, concerts, backlight or people dressed in dark clothing.
White
More restrained, softer lighting. Wedding photography, daytime photography, close-ups, objects. It results in vivid imaging (for example in case of white skin people and light clothing).
Gray
It has no effect on colors and is therefore suitable for subject photography, for example. Very useful when you want more restrained, softer lighting. The shadow behind the subject disappears almost completely.
Gold
Warm mood shots (for example: candlelight, golden hour). Early morning and late afternoon photos. Body painting, highlighting hair photos, makeup, soft, vivid illumination of brown skin.