Luminism is an American art movement* that developed around 1850. Like Impressionism, it is all about the depiction of light. However, its treatment is different. "While an Impressionist landscape may be said to surround and engulf the viewer with its depiction of sunlight, a luminist landscape typically contains a much deeper perspective, along with objects captured in detail in crystal clear light - like a frozen moment when time stops. The effect of this is very often a sense of great tranquility and calm, which is further enhanced by the luminist technique of concealing all visible brushwork beneath a smooth, slick finish." (Visual Arts Encyclopedia website)

Here are a handful of Luminist paintings, hopefully providing that "sense of great tranquility and calm."