ALL DIODES ON FULL
λd (dominant waveL):1048
482.3 nm
pe (excitation purity):1049
0.394
CCT:1019
7272K
CIE1960 u:1045
0.1979
CIE1960 v:1046
0.3048
CQS Qa:1022
82.3 (7272K)
CQS Qa:1025
82.3 (7272K)
CQS Qf:1023
82.3 (7272K)
CQS Qp:1024
84.3 (7272K)
CQS R01:1026
74.9 (7272K)
CQS R02:1027
81.9 (7272K)
CQS R03:1028
81.9 (7272K)
CQS R04:1029
89.9 (7272K)
CQS R05:1030
97.0 (7272K)
CQS R06:1031
91.3 (7272K)
CQS R07:1032
87.8 (7272K)
CQS R08:1033
80.5 (7272K)
CQS R09:1034
76.3 (7272K)
CQS R10:1035
70.4 (7272K)
CQS R11:1036
76.0 (7272K)
CQS R12:1037
94.1 (7272K)
CQS R13:1038
86.3 (7272K)
CQS R14:1039
88.2 (7272K)
CQS R15:1040
82.8 (7272K)
CRI DC:1017
4.22E-3
CRI R01:1002
87.3 (7272K)
CRI R02:1003
93.8 (7272K)
CRI R03:1004
93.8 (7272K)
CRI R04:1005
84.7 (7272K)
CRI R05:1006
85.8 (7272K)
CRI R06:1007
86.6 (7272K)
CRI R07:1008
88.6 (7272K)
CRI R08:1009
75.0 (7272K)
CRI R09:1010
27.3 (7272K)
CRI R10:1011
82.8 (7272K)
CRI R11:1012
84.7 (7272K)
CRI R12:1013
59.5 (7272K)
CRI R13:1014
90.4 (7272K)
CRI R14:1015
97.4 (7272K)
CRI R15:1016
84.5 (7272K)
CRI Ra:1001
87.0 (7272K)
DC<5.4E-3:1018
true
Rf:1042
82.121
Rg:1043
94.181
Colorimetry is the science to describe physically the human color perception. The wavelength range 380 nm - 780 nm is visible to humans and detected by three different photoreceptors. Many Reptiles see the range 350 nm - 800 nm and have an additional UV photoreceptor in their retina.
Whereas a spectrometer measures the intensity in every tiny wavelength interval resulting in thousands of individual intensities, the human eye only measures three intensities detected by the three cones. The same is true for the reptile eye with usually three or four photoreceptors. Effectively the detailled spectrum displayed above reduces to a much compacter bar graph displayed below. The photoreceptor sensitivites from these L-Cone, M-Cone, S-Cone, and U-Cone are used, they are chosen as an average of measured reptile photoreceptor sensitivity curves. The bar graph also shows as reference the intensity seen by the three or four photoreceptors for average sunlight (id 1).
From these three numbers the colour coordinate and the correlated colour temperature for humans are calculated using the CIE standard method. I adapted this concept to a "3 cone reptile (M,S,U)" and a "4 cone reptile (L,M,S,U)". I am sure, that this adaption to other colour spaces makes sense mathematically and this is also done in scientific research regarding colour vision of animals, however I have not seen calculation of colour temperatures for other animals in the scientific literature. Even if it is hypothetical, at least this shows, how arbitrary the colour temperature is, and that the colour temperature calculated for humans does not apply to reptiles. The colour spaces also show the colour coordinates of different phases of daylight ((ids
1,
338 –
451,
511 –
513 ), indicated by crosses, coloured in the appriximate colour perceived by a human.
|
Human (CIE) |
3 cone reptile |
4 cone reptile |
| Cone Excitation |
| 
|  |
| Colour Coordinate |
( 0.3 ; 0.31 ) |
( 0.42 ; 0.44 ) |
( 0.28 ; 0.31
; 0.32 ) |
| CCT |
7300 Kelvin |
4700 Kelvin |
5100 Kelvin |
| distance |
|
0.1 |
0.079 |
| colour space |
 |
 |
3-D-graph not implemented yet |
Vitamin D3 is produced by UVB radiation around 300 nm. 7DHC/ProD3 present in the skin is converted to PreD3 when absorbing an UV photon. PreD3 can be converted back to ProD3, to Lumisterol, or to Tachysterol when absorbing another UV photon or can be converted to Vitamin D3 in a warm environment.
This process prevents any overdose of vitamin D3 from UV radiation with a spectrum similar to sunlight. As a comparison the solar spectra at 20°(id:14) and at 85°(id:21) solar angle are shown.
The ratio of the two solarmeters 6.2 (UVB) and 6.5 (UV index) readings has proven a useful and very simply number to acess the spectral shape in the vitamin-d3-active region.
Effective irradiances are calculated for all ranges, actionspectra and radiometers currently present in this database.
The calculation method is a numerical implementation (Simpson's rule) of the formula
To learn more about calculating effective irradiances and radiometers I recommend this excellent report on UVB meters: Characterizing the Performance of Integral Measuring UV-Meters (pdf).
The numbers in the following tables can also be used to estimate certain (effective) irradiances from radiomer readings. Example: If the database lists
- range: UVB (US) = 13.8 µW/cm²
- radiometer: Solarmeter 6.2 = 19.6 µW/cm²
then any Solarmeter 6.2 reading multiplied with 0.7 (0.7=13.8/19.6) is an estimate of UVB irradiance for this specific lamp. If you do so, always make sure, that the calculated (effective) irradiance is valid. The calculated value is not valid, if the lamp's spectrum is not measured in the relevant range.