Index of Natural and Artifical Light

Tn
[Kelvin]
1000000/Tn
[Mired]
Illuminant, nature Source, simulation
> 5300 K: “Daylight white” natural lighting
13 500
to
27 000
Approx. 74 to 37 North blue sky
9 300 107 Original white point of CRT screens
9 000
to
12 000
111 to 83 “The blue hour” Only perceptible with eyes used to warm white
8 500 125 Lighting in fog
7504
(“7500”)
133 D75 – North sky daylight Predefined in just LED cabinets with Ra 99
6774 148 C – Average daylight Standard light A lamp with double Davis-Gibson copper sulfate liquid filter (disadvantage: insufficient UV content); C is the white point in NTSC televsion
6504
(“6500”)
154 D65 – Noon daylight, indirect sunlight at noon. White point illuminant in sRCG and AdobeRGB, as well as in PAL and SECAM television F7 UV-rich broad band daylight fluorescent lamp. e.g. Just Normlicht Color Control Daylight 6500 with Ra 98;
– Backlight in LCD monitors;
– Predefined illuminant in Just LED cabinets with Ra 99
6430 155 F1 Standard daylight fluorescent lamp
different references with Ra 76
6350 156 F1 UV-weak daylight fluorescent lamp
different references with Ra 72
6000 167 Sun at the zenit Xe Xenon high-pressure lamp e.g. for earlier reproduction technology
5503
(“5500”)
182 D55 – Mid-morning daylight Electronic flash devices designed for daylight film and digital photography
5454 183 E – equi-energy spectrum
x=y=1/3
Theoretical illuminant as geometric center point of color triangle CIExyY
5300 to 3300 K: “Neutral or cool white range”, objective lighting
5003
(“5000”)
200 D50 – horizon daylight, standard lighting for the printing industry F8 Broadband fluorescent lamp reference: Philips/Osram Sylvania F40Design 50 with Ra 90 to 95; leading standard lighting for the printing industry from Just Normlicht (daylight proGraphic ISO 3664:2009 with Ra 98);
– F10 Narrow tri-band fluorescent lamp
reference: Philips TL85 and Ultralume 50 with Ra 81;
– Predefined illuminant in Just LED cabinets with Ra 99 (with and without UV-A content)
4874 204 B – “Beck light”, direct sunlight at noon, replaced as standard by D50 – Standard A lamp with Davis-Gibson copper sulfate liquid filter;
– Beck carbon arc lamps (previously standard for spectroscopy measuring light and cinema projection lamps due to their broad and even spectrum)
4700 213 Sun at elevation 20° Reproduction technology: Xenon low-pressure lamp
4230 236 Hard cool white F2 (F, F02) Cool white fluorescent lamp (Fcw, CWF, CWF2), different references with Ra 64
4150 241 Soft cool white – F9 Broadband fluorescent lamp, reference: Philips Cool White Deluxe with Ra 90;
– F6 Semi-broadband fluorescent lamp
(tube bande semi-large fluorescente),
reference: Philips Lite White with Ra 59
4100 244 Moonlight Reproduction technology: Xenon arc lamp
4000 250 Sun at elevation 10° -F11 Narrow tri-band fluorescent lamp, reference: “Point of Sale Lamp” TL84 Ultralume 40 and SP41 with Ra 83;
– Predefined illuminant in Just LED cabinets with Ra 99
3800 263 Photo flash lamp
3450 290 F3 “White” standard fluorescent lamp,
different references with Ra 57
3400 294 Evening sun shortly before dusk Tungsten halogen photo studio lamp, type A/S
3300 303 Modern cinema projection lamp
3300 K: “Warm white range”, cozy lighting atmosphere
3200 312 Tungsten halogen photo studio lamp,
B-type warm white tube
3100 323 (designed for artificial light film) 500-W opal lamp
3000 333 Warm white – F12 Narrow tri-band fluorescent lamp,
reference: Philips TL83 Ultralume 30
with Ra 83);
– 200-W incandescent lamp with Ra < 50
2490 402 Warm white F4 “Warm white” standard fluorescent lamp,
different references with Ra 51
2856 350 A – “Artificial light” – Gas-filled tungsten lamp,
– Predefined in Just LED cabinets with Ra 99
< 3300 K: “Warm white range”, cozy lighting atmosphere
2800 357 100W incandescent lamp
2680 273 60W incandescent lamp
2360 424 G – “glow-lamp light” Vacuum tungsten lamp
2200 455 40W incandescent lamp
2000 500 Sunset Sodium vapor lamp
1900 526 P – “petrol lamp light” Oil lamp

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