There is a reason why real HDR monitors have minimum requirement of 1000 cd/m² for monitors and 4000 cd/m² for projectors. It is because realistic mid-day scene requires 700 cd/m² and sky over 2000 cd/m². Anything less and day scenes will start to look more like like dusk or dawn. Some low quality theatres are killing 3D cinema with not enough brightness, because even mid-day bright scenes looks dark and de-colourised, because human eye is switching to monochromatic vision under low light conditions.
Factor
(cd/m²) Multiple Value Item
----------------- --- HDR Projector Range Start
0 µcd/m² Ideal black body
10^−6 1 µcd/m² Absolute threshold of vision
10^−4 400 µcd/m² Darkest sky
----------------- --- OLED HDR Monitor Range Start
10^−3 1 mcd/m² Night sky
2 mcd/m² Typical photographic scene lit by full moon
5 mcd/m² Approximate scotopic/mesopic threshold
----------------- --- LED HDR Monitor Range Start
10^−2 40 mcd/m² Phosphorescent markings on a watch dial after 1 h in the dark
10^0 2 cd/m² Floodlit buildings, monuments, and fountains
5 cd/m² Approximate mesopic/photopic threshold
10^1 25 cd/m² Typical photographic scene at sunrise or sunset
30 cd/m² Green electroluminescent source
55 cd/m² Standard SMPTE cinema screen luminance
80 cd/m² Monitor white in the sRGB reference viewing environment
10^2 250 cd/m² Peak luminance of a typical LCD monitor
----------------- --- OLED HDR Monitor Range End
700 cd/m² Typical photographic scene on overcast day
----------------- --- LED HDR Monitor Range End
10^3 2 Kcd/m² Average cloudy sky
3 Kcd/m² Moon surface
5 Kcd/m² Typical photographic scene in full sunlight
----------------- --- HDR Projector Range End
7 Kcd/m² Average clear sky
10^4 10 Kcd/m² White illuminated cloud
----------------- --- Human eye comfort / Hi-End HDR limit
12 Kcd/m² Fluorescent lamp
75 Kcd/m² Low pressure sodium-vapor lamp
10^5 130 Kcd/m² Frosted incandescent light bulb
600 Kcd/m² Solar disk at horizon
10^6 7 Mcd/m² Filament of a clear incandescent lamp
10^8 100 Mcd/m² Possible retinal damage
10^9 1.6 Gcd/m² Solar disk at noon
Luminance Source: https://en.wikipedia.org/wiki/Orders_of_magnitude_(luminance)
Human eye experiences up to 90 000 nits (cd/m²) per day. These popular standards exists to cover this:
* HDR10 for LED (0.05 nits black, ≥1000 nits peak, 10-bit color depth)
* HDR10 for OLED (0.0005 nits black, ≥540 nits peak, 10-bit color depth)
* Dolby Vision for Cinema (0 nits black, ≥4000 nits peak, 12-bit color depth)
Factor (cd/m²) Multiple Value Item ----------------- --- HDR Projector Range Start 0 µcd/m² Ideal black body 10^−6 1 µcd/m² Absolute threshold of vision 10^−4 400 µcd/m² Darkest sky ----------------- --- OLED HDR Monitor Range Start 10^−3 1 mcd/m² Night sky 2 mcd/m² Typical photographic scene lit by full moon 5 mcd/m² Approximate scotopic/mesopic threshold ----------------- --- LED HDR Monitor Range Start 10^−2 40 mcd/m² Phosphorescent markings on a watch dial after 1 h in the dark 10^0 2 cd/m² Floodlit buildings, monuments, and fountains 5 cd/m² Approximate mesopic/photopic threshold 10^1 25 cd/m² Typical photographic scene at sunrise or sunset 30 cd/m² Green electroluminescent source 55 cd/m² Standard SMPTE cinema screen luminance 80 cd/m² Monitor white in the sRGB reference viewing environment 10^2 250 cd/m² Peak luminance of a typical LCD monitor ----------------- --- OLED HDR Monitor Range End 700 cd/m² Typical photographic scene on overcast day ----------------- --- LED HDR Monitor Range End 10^3 2 Kcd/m² Average cloudy sky 3 Kcd/m² Moon surface 5 Kcd/m² Typical photographic scene in full sunlight ----------------- --- HDR Projector Range End 7 Kcd/m² Average clear sky 10^4 10 Kcd/m² White illuminated cloud ----------------- --- Human eye comfort / Hi-End HDR limit 12 Kcd/m² Fluorescent lamp 75 Kcd/m² Low pressure sodium-vapor lamp 10^5 130 Kcd/m² Frosted incandescent light bulb 600 Kcd/m² Solar disk at horizon 10^6 7 Mcd/m² Filament of a clear incandescent lamp 10^8 100 Mcd/m² Possible retinal damage 10^9 1.6 Gcd/m² Solar disk at noonLuminance Source: https://en.wikipedia.org/wiki/Orders_of_magnitude_(luminance) Human eye experiences up to 90 000 nits (cd/m²) per day. These popular standards exists to cover this: * HDR10 for LED (0.05 nits black, ≥1000 nits peak, 10-bit color depth) * HDR10 for OLED (0.0005 nits black, ≥540 nits peak, 10-bit color depth) * Dolby Vision for Cinema (0 nits black, ≥4000 nits peak, 12-bit color depth)