ArgyllCMS spectra viewer and converter

a*b* diagram

Spectra processed: 18, wavelength range: 360–740 nm.
CSV file | report: https://pozhvanov.com/spectro?view_id=Light_sources&legend=on

#	sRGB	R	G	B	H	S	B(V)	L	X	Y	Z	L*	a*	b*	λmin	λmax	Integral
Cloudy	#ffffff	255 255	255 255	255 255	0 0	0 0	100 100	100 100	165.2	177.4	183.7	124.4	-7	-19.1	367	493	87.63 K
Cloudy	#ffffff	255 255	255 255	255 255	0 0	0 0	100 100	100 100	174	186.9	193.6	126.9	-7.1	-19.4	380	493	92.3 K
Cloudy	#ffffff	255 255	255 255	255 255	0 0	0 0	100 100	100 100	153.6	164.9	170.4	121	-6.7	-18.5	363	497	81.41 K
E-saver	#ffb863	255 215	184 179	99 99	33 41	61 54	100 84	69 62	66.3	58.7	15.1	81.1	22.6	53.8	363	613	18.9 K
E-saver	#ffbd66	255 221	189 184	102 102	34 41	60 54	100 87	70 63	69.8	61.9	15.9	82.9	22.8	54.9	363	613	19.94 K
E-saver	#ffbe65	255 222	190 186	101 102	35 42	60 54	100 87	70 64	70.6	62.8	16	83.3	22.6	55.6	363	613	20.15 K
Flourescent	#ffea8b	255 255	234 240	139 142	49 52	45 44	100 100	77 78	112	99.7	28.9	99.9	26.2	58.8	363	613	32.44 K
Flourescent	#ffea8e	255 255	234 240	142 144	49 52	44 44	100 100	78 78	111.8	99.4	29.6	99.8	26.3	57.4	363	613	32.31 K
Flourescent	#fff898	255 255	248 255	152 157	56 60	40 38	100 100	80 81	128.7	114.3	34.5	105.3	27.7	59.5	363	613	37.03 K
Petzl(M)	#858c98	133 119	140 121	152 133	218 231	13 11	60 52	56 49	24.8	25.9	25.4	57.9	-0.8	-7.6	363	460	8.94 K
Petzl(M)	#868e9b	134 121	142 123	155 136	217 232	14 11	61 53	57 50	25.6	26.8	26.5	58.7	-0.8	-8	370	460	9.27 K
Petzl(M)	#858d9a	133 120	141 122	154 134	217 231	14 10	60 53	56 50	25.1	26.3	25.9	58.3	-0.8	-7.8	370	460	9.09 K
Petzl(H)	#a4aebe	164 155	174 158	190 174	217 231	14 11	75 68	69 65	39.9	41.8	41.3	70.8	-1.2	-9.3	363	460	14.33 K
Petzl(H)	#a2acbc	162 153	172 156	188 171	217 230	14 11	74 67	69 64	39	40.8	40.3	70.1	-1.3	-9.1	373	460	14.02 K
Petzl(H)	#a1abba	161 151	171 154	186 169	216 230	13 11	73 66	68 63	38.2	40	39.5	69.5	-1.2	-9.1	373	460	13.72 K
MT24-EX	#edffff	237 254	255 255	255 255	180 180	7 0	100 100	96 100	97.3	101.8	112.6	100.7	-1.5	-20.7	397	470	50 K
MT24-EX	#ddf3ff	221 233	243 239	255 255	201 224	13 9	100 100	93 96	83.7	87.9	97.4	95.1	-2	-19.8	377	470	43.1 K
MT24-EX	#e2f6ff	226 238	246 243	255 255	199 222	11 7	100 100	94 97	86.5	90.6	100	96.2	-1.5	-19.7	360	470	44.45 K

Use ArgyllCMS to acquire spectra:

#   reflectance spectrum
spotread -v -s -H "file_refl.sp"
#   transmission spectrum
spotread -v -s -H -t "file_trans.sp"
#   emission spectrum
spotread -v -s -H -e "file_emiss.sp"
#   flash emission spectrum
spotread -v -s -H -f "file_flash.sp"
#   ambient light spectrum
spotread -v -s -H -a "file_ambnt.sp"
Do not know how to start?
Try viewing ambient light spectrum or compare cloudy sky with flashlight, macro flash and two different lamps.
Found bugs, have suggestions, etc.? You know where to complain.
Application manual is coming later this year.