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 |