Photoshop's Light adjustment layer brings Camera Raw's core tonal controls — exposure, contrast, highlights, shadows, whites, and blacks — directly into the layers panel as a fully non-destructive, maskable layer. This makes it possible to apply precise tonal corrections to specific areas of an image without ever
Read the full article here: Using Photoshop's Light Adjustment Layer for Non-Destructive Tonal Control Photoshop Roadmap