Ambient lighting, or the lighting in the room where you are using your computer, can impact how HDR content is perceived on your display. In general, it is best to use your computer in a well-lit room with consistent lighting, as this can help to reduce glare and reflections on the screen and make it easier to see the full range of colors and contrast ratios that HDR content has to offer.
However, if the ambient lighting in the room is too bright or uneven, it can wash out the colors on your display and make it difficult to see the full benefit of HDR. In these cases, it may be helpful to adjust the lighting in the room or use a screen protector or hood to reduce any visible glare.