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