CCT:1019 4901K
CRI DC:1017 6,77E-3
CRI R01:1002 75,7 (4901K)
CRI R02:1003 86,5 (4901K)
CRI R03:1004 93,5 (4901K)
CRI R04:1005 75,0 (4901K)
CRI R05:1006 75,8 (4901K)
CRI R06:1007 81,1 (4901K)
CRI R07:1008 85,7 (4901K)
CRI R08:1009 61,2 (4901K)
CRI R09:1010 -7,3 (4901K)
CRI R10:1011 67,3 (4901K)
CRI R11:1012 72,0 (4901K)
CRI R12:1013 48,6 (4901K)
CRI R13:1014 78,6 (4901K)
CRI R14:1015 96,5 (4901K)
CRI R15:1016 68,7 (4901K)
CRI Ra:1001 79,3 (4901K)
DC<5.4E-3:1018 false
X:1022 17,27
Y:1023 18,23
Z:1024 13,91
x:1026 0,3496
y:1027 0,3690
z:1028 0,2815
Spectrum 722: SW81 Edit
DeleteMeasurement
| Brand |
other other |
|---|---|
| Lamp Product |
XXXLutz LED Panel |
| Lamp ID |
SW81 (07/2021) |
| Spectrometer | USB2000+ |
| Ballast | - no ballast or default/unknown ballast - |
| Reflector | |
| Distance | 10 cm |
| Age | 2 hours |
| Originator (measurement) | Sarina Wunderlich |
Database entry created:
Sarina Wunderlich
10/Jul/2023 ; updated:
Sarina Wunderlich
10/Jul/2023
Colorimetry
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 | ( 0.35 ; 0.37 ) | ( 0.56 ; 0.43 ) | ( 0.41 ; 0.33 ; 0.26 ) |
| CCT | 4900 Kelvin | 3400 Kelvin | 3700 Kelvin |
| distance | 0.12 | 0.075 | |
| colour space | 3-D-graph not implemented yet |
Vitamin D3 Analysis
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
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
Ranges
total ( 0 nm - 0 nm) 4050 µW/cm² = 40.5 W/m² UVC ( 0 nm - 280 nm) 0 µW/cm² = 0 W/m² non-terrestrial ( 0 nm - 290 nm) 0 µW/cm² = 0 W/m² total2 ( 250 nm - 880 nm) 4050 µW/cm² = 40.5 W/m² UVB (EU) ( 280 nm - 315 nm) 1.28 µW/cm² = 0.0128 W/m² UVB (US) ( 280 nm - 320 nm) 1.7 µW/cm² = 0.017 W/m² UVA+B ( 280 nm - 380 nm) 5.21 µW/cm² = 0.0521 W/m² Solar UVB ( 290 nm - 315 nm) 1.28 µW/cm² = 0.0128 W/m² UVA D3 regulating ( 315 nm - 335 nm) 1.46 µW/cm² = 0.0146 W/m² UVA (EU) ( 315 nm - 380 nm) 3.93 µW/cm² = 0.0393 W/m² UVA2 (medical definition) ( 320 nm - 340 nm) 1.26 µW/cm² = 0.0126 W/m² UVA (US) ( 320 nm - 380 nm) 3.51 µW/cm² = 0.0351 W/m² UVA1 (variant) ( 335 nm - 380 nm) 2.47 µW/cm² = 0.0247 W/m² UVA1 (medical) ( 340 nm - 400 nm) 3.38 µW/cm² = 0.0338 W/m² vis. UVA ( 350 nm - 380 nm) 1.61 µW/cm² = 0.0161 W/m² VIS Rep3 ( 350 nm - 600 nm) 2960 µW/cm² = 29.6 W/m² VIS Rep4 ( 350 nm - 700 nm) 3970 µW/cm² = 39.7 W/m² purple ( 380 nm - 420 nm) 5.41 µW/cm² = 0.0541 W/m² VIS ( 380 nm - 780 nm) 4030 µW/cm² = 40.3 W/m² VIS2 ( 400 nm - 680 nm) 3900 µW/cm² = 39 W/m² PAR ( 400 nm - 700 nm) 3960 µW/cm² = 39.6 W/m² tmp ( 400 nm - 1100 nm) 4050 µW/cm² = 40.5 W/m² blue ( 420 nm - 490 nm) 944 µW/cm² = 9.44 W/m² green ( 490 nm - 575 nm) 1470 µW/cm² = 14.7 W/m² yellow ( 575 nm - 585 nm) 220 µW/cm² = 2.2 W/m² orange ( 585 nm - 650 nm) 1060 µW/cm² = 10.6 W/m² red ( 650 nm - 780 nm) 333 µW/cm² = 3.33 W/m² IRA ( 700 nm - 1400 nm) 82 µW/cm² = 0.82 W/m² IR2 ( 720 nm - 1100 nm) 49.8 µW/cm² = 0.498 W/m² IRB ( 1400 nm - 3000 nm) 0 µW/cm² = 0 W/m²
Actionspectra
Erythema 0.101 UV-Index Pyrimidine dimerization of DNA 0.917 µW/cm² Photoceratitis 0.155 µW/cm² Photoconjunctivitis 0.00264 µW/cm² DNA Damage 0.00865 Vitamin D3 0.503 µW/cm² Photosynthesis 2590 µW/cm² Luminosity 14100 lx Human L-Cone 2120 µW/cm² Human M-Cone 1730 µW/cm² Human S-Cone 755 µW/cm² CIE X 1860 µW/cm² CIE Y 1970 µW/cm² CIE Z 1500 µW/cm² PAR 18200000 mol photons Extinction preD3 2.24 e-3*m²/mol Extinction Tachysterol 7.48 e-3*m²/mol Exctincition PreD3 1010 m²/mol Extinction Lumisterol 0.443 m²/mol Exctincition Tachysterol 9920 m²/mol Extinction 7DHC 0.274 m²/mol L-Cone 1810 µW/cm² M-Cone 1470 µW/cm² S-Cone 1130 µW/cm² U-Cone 20.1 µW/cm² UVR - ICNIRP 2004 0.0854 Rel Biol Eff Melatonin Supression 1110 µW/cm² Blue Light Hazard 784 µW/cm² (55.7 µW/cm² per 1000 lx) CIE 174:2006 PreVit D3 0.572 µW/cm² Lumen Reptil 11200 "pseudo-lx" Vitamin D3 Degradation 0.357 µW/cm² Actinic UV 0.0819 µW/cm² (0.0582 mW/klm) Exctincition Lumisterol 601 m²/mol Exctincition 7DHC 360 m²/mol Exctincition Toxisterols 136 m²/mol
Broadbandmeters
Solarmeter 6.2 (UVB, pre 2010) 1.93 µW/cm² Solarmeter 6.5 (UV-Index, pre 2010) 0.14 Leybold UVB 1.51 µW/cm² Leybold UVA 2.52 µW/cm² Leybold UVC 0 µW/cm² DeltaOhm UVB 2.4 µW/cm² DeltaOhm UVC 0.347 µW/cm² Vernier UVB 0.674 µW/cm² Vernier UVA 2.63 µW/cm² Gröbel UVA 3.26 µW/cm² Gröbel UVB 0.924 µW/cm² Gröbel UVC 0.000613 µW/cm² Luxmeter 14400 lx Solarmeter 6.4 (D3) 0.439 IU/min UVX-31 2.68 µW/cm² IL UVB 0.000828 µW/cm² IL UVA 3 µW/cm² Solarmeter 6.5 (UVI, post 2010) 0.112 UV-Index Solarmeter 6.2 (UVB, post 2010) 1.14 µW/cm² (Solarmeter Ratio = 10.2) Solarmeter AlGaN 6.5 UVI sensor 1.16 UV Index GenUV 7.1 UV-Index 0.0585 UV-Index Solarmeter 10.0 (Global Power) (manuf.) 44 W/m² Solarmeter 4.0 (UVA) 0.0458 mW/cm² LS122 (manuf.) 0.0142 W/m² ISM400 (first guess) 31.3 W/m² LS122 (assumption) 1.69 W/m² ISM400_new 25.3 W/m² Solarmeter 10.0 (Global Power) (assumption) 43.4 W/m²