A number, not a promise.
A nit is a unit of luminance. In Glowhite, the peak setting controls how brightly the exported file describes its strongest highlights. Your display and its rendering software decide how that request appears.
Screen capability, brightness settings and the size of the bright area can all affect the result. Two different export settings may look similar on the same screen.
Start with a range, then refine.
These are creative starting points, not universal display targets. Compare them on your own artwork.
- 400–600 nits: try a restrained treatment first.
- 1,000–1,200 nits: a useful starting point for a compact white mark.
- 1,600 nits and above: compare carefully, especially with large white areas.
- 4,000 nits: the top of Glowhite’s range; extra encoded brightness may not become extra visible light.
Give the highlight some space.
A small white detail against a dark field can make a stronger impression than an entirely bright image. Keep contrast and legibility doing most of the work. HDR should add to the composition.
If too much of the image lights up, raise the highlight-selection threshold. If the focal point feels harsh, reduce peak brightness. Check both the HDR rendering and the ordinary-screen result before sharing.