High Dynamic Range (HDR) is a key advancement in display technology that has transformed how we experience visuals on our screens. HDR allows for a broader range of brightness, from deep blacks to bright whites, along with more detailed and nuanced colors. This wider dynamic range means images appear more contrasted, with richer and subtler color variations. The human eye can perceive a much greater range of light intensity than traditional screens can reproduce, so HDR aims to bridge that gap by enhancing details in both shadows and highlights. Unlike Standard Dynamic Range (SDR), which is based on older cathode-ray tube technology, HDR provides a more accurate representation of what we see in real life. HDR is often mistakenly associated solely with making images brighter. However, it's more about expanding the entire range of light values, from the darkest to the lightest, rather than increasing brightness overall. This includes subtle gradations of color and light, which contribute to a more natural and lifelike visual experience. A common measurement of brightness is the nit, with 1 nit equal to 1 cd/m². While brightness is an important aspect of HDR, it's just one part of the overall picture. To fully enjoy HDR, the entire viewing chain — from the source (such as a streaming service or Blu-ray disc) to the display — must be compatible. Different HDR formats, such as HDR10, HDR10+, HDR10+ Adaptive, and HDR10+ Advanced, offer various levels of detail and adaptability. HDR10 is a widely used open standard that uses 10-bit color depth and static metadata. HDR10+ improves on this with dynamic metadata, which adjusts brightness and contrast based on the scene. HDR10+ Adaptive further enhances this by adapting to the lighting in the room, and HDR10+ Advanced, introduced in 2026, adds AI-driven optimization for even better performance. Other HDR formats include HLG, a royalty-free format that works on both standard and HDR displays, and Dolby Vision, a proprietary format that uses dynamic metadata and offers up to 12-bit color depth. Dolby Vision IQ and Dolby Vision 2 further refine these capabilities by adapting to room lighting and offering advanced features for different types of content. Streaming services such as Netflix, Amazon Prime Video, and Apple TV support various HDR formats, though availability may vary by region and platform. As HDR technology continues to evolve, it promises to bring more immersive and visually rich experiences to viewers around the world.