CCT:1019 3183K
CRI DC:1017 1,42E-3
CRI R01:1002 78,8 (3183K)
CRI R02:1003 89,0 (3183K)
CRI R03:1004 96,6 (3183K)
CRI R04:1005 78,8 (3183K)
CRI R05:1006 79,1 (3183K)
CRI R06:1007 86,3 (3183K)
CRI R07:1008 82,7 (3183K)
CRI R08:1009 57,6 (3183K)
CRI R09:1010 1,1 (3183K)
CRI R10:1011 74,4 (3183K)
CRI R11:1012 77,0 (3183K)
CRI R12:1013 62,2 (3183K)
CRI R13:1014 81,1 (3183K)
CRI R14:1015 98,4 (3183K)
CRI R15:1016 71,2 (3183K)
CRI Ra:1001 81,1 (3183K)
DC<5.4E-3:1018 true
X:1022 18,75
Y:1023 17,75
Z:1024 7,48
x:1026 0,4263
y:1027 0,4036
z:1028 0,1701
Spectrum 717: 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 | ( 0.43 ; 0.4 ) | ( 0.62 ; 0.37 ) | ( 0.55 ; 0.28 ; 0.17 ) |
| CCT | 3200 Kelvin | 2900 Kelvin | 2800 Kelvin |
| distance | 0.086 | 0.039 | |
| 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) 3900 µW/cm² = 39 W/m² UVC ( 0 nm - 280 nm) 7.51 µW/cm² = 0.0751 W/m² non-terrestrial ( 0 nm - 290 nm) 7.51 µW/cm² = 0.0751 W/m² total2 ( 250 nm - 880 nm) 3890 µW/cm² = 38.9 W/m² UVB (EU) ( 280 nm - 315 nm) 1.14 µW/cm² = 0.0114 W/m² UVB (US) ( 280 nm - 320 nm) 1.55 µW/cm² = 0.0155 W/m² UVA+B ( 280 nm - 380 nm) 4.57 µW/cm² = 0.0457 W/m² Solar UVB ( 290 nm - 315 nm) 1.14 µW/cm² = 0.0114 W/m² UVA D3 regulating ( 315 nm - 335 nm) 1.27 µW/cm² = 0.0127 W/m² UVA (EU) ( 315 nm - 380 nm) 3.43 µW/cm² = 0.0343 W/m² UVA2 (medical definition) ( 320 nm - 340 nm) 1.07 µW/cm² = 0.0107 W/m² UVA (US) ( 320 nm - 380 nm) 3.02 µW/cm² = 0.0302 W/m² UVA1 (variant) ( 335 nm - 380 nm) 2.16 µW/cm² = 0.0216 W/m² UVA1 (medical) ( 340 nm - 400 nm) 2.82 µW/cm² = 0.0282 W/m² vis. UVA ( 350 nm - 380 nm) 1.44 µW/cm² = 0.0144 W/m² VIS Rep3 ( 350 nm - 600 nm) 2320 µW/cm² = 23.2 W/m² VIS Rep4 ( 350 nm - 700 nm) 3770 µW/cm² = 37.7 W/m² purple ( 380 nm - 420 nm) 3.19 µW/cm² = 0.0319 W/m² VIS ( 380 nm - 780 nm) 3870 µW/cm² = 38.7 W/m² PAR ( 400 nm - 700 nm) 3770 µW/cm² = 37.7 W/m² blue ( 420 nm - 490 nm) 496 µW/cm² = 4.96 W/m² green ( 490 nm - 575 nm) 1210 µW/cm² = 12.1 W/m² yellow ( 575 nm - 585 nm) 237 µW/cm² = 2.37 W/m² orange ( 585 nm - 650 nm) 1430 µW/cm² = 14.3 W/m² red ( 650 nm - 780 nm) 487 µW/cm² = 4.87 W/m² IRA ( 700 nm - 1400 nm) 111 µW/cm² = 1.11 W/m² IRB ( 1400 nm - 3000 nm) 0 µW/cm² = 0 W/m²
Actionspectra
Erythema 0.0931 UV-Index Pyrimidine dimerization of DNA 0.847 µW/cm² Photoceratitis 0.142 µW/cm² Photoconjunctivitis 0.00246 µW/cm² DNA Damage 0.00802 Vitamin D3 0.468 µW/cm² Photosynthesis 2410 µW/cm² Luminosity 13700 lx Human L-Cone 2140 µW/cm² Human M-Cone 1540 µW/cm² Human S-Cone 405 µW/cm² CIE X 2020 µW/cm² CIE Y 1910 µW/cm² CIE Z 807 µW/cm² PAR 18100000 mol photons Extinction preD3 2.04 e-3*m²/mol Extinction Tachysterol 6.8 e-3*m²/mol Exctincition PreD3 922 m²/mol Extinction Lumisterol 0.413 m²/mol Exctincition Tachysterol 8970 m²/mol Extinction 7DHC 0.251 m²/mol L-Cone 1940 µW/cm² M-Cone 1000 µW/cm² S-Cone 597 µW/cm² U-Cone 11.9 µW/cm² UVR - ICNIRP 2004 0.0786 Rel Biol Eff Melatonin Supression 630 µW/cm² Blue Light Hazard 424 µW/cm² (30.8 µW/cm² per 1000 lx) CIE 174:2006 PreVit D3 0.534 µW/cm² Lumen Reptil 9580 "pseudo-lx" Vitamin D3 Degradation 0.323 µW/cm² Actinic UV 0.0754 µW/cm² (0.0549 mW/klm) Exctincition Lumisterol 559 m²/mol Exctincition 7DHC 327 m²/mol Exctincition Toxisterols 122 m²/mol
Broadbandmeters
Solarmeter 6.2 (UVB, pre 2010) 1.73 µW/cm² Solarmeter 6.5 (UV-Index, pre 2010) 0.131 Leybold UVB 1.35 µW/cm² Leybold UVA 2.18 µW/cm² Leybold UVC 0 µW/cm² DeltaOhm UVB 2.12 µW/cm² DeltaOhm UVC 0.307 µW/cm² Vernier UVB 0.642 µW/cm² Vernier UVA 2.32 µW/cm² Gröbel UVA 2.85 µW/cm² Gröbel UVB 0.839 µW/cm² Gröbel UVC 0.000638 µW/cm² Solarmeter 6.4 (D3) 0.41 IU/min UVX-31 2.37 µW/cm² IL UVB 0.000745 µW/cm² IL UVA 2.61 µW/cm² Solarmeter 6.5 (UVI, post 2010) 0.105 UV-Index Solarmeter 6.2 (UVB, post 2010) 1.02 µW/cm² (Solarmeter Ratio = 9.73) Solarmeter AlGaN 6.5 UVI sensor 1.04 UV Index GenUV 7.1 UV-Index 0.0527 UV-Index Solarmeter 10.0 (Global Power) 45.2 W/m² Solarmeter 4.0 (UVA) 0.0391 mW/cm² LS122 0.0124 W/m² ISM400 34.8 W/m²