CCT:1019 7393K
CRI DC:1017 7,58E-3
CRI R01:1002 94,6 (7393K)
CRI R02:1003 92,8 (7393K)
CRI R03:1004 78,7 (7393K)
CRI R04:1005 94,9 (7393K)
CRI R05:1006 97,1 (7393K)
CRI R06:1007 98,4 (7393K)
CRI R07:1008 95,3 (7393K)
CRI R08:1009 87,2 (7393K)
CRI R09:1010 63,9 (7393K)
CRI R10:1011 79,2 (7393K)
CRI R11:1012 93,9 (7393K)
CRI R12:1013 93,4 (7393K)
CRI R13:1014 89,6 (7393K)
CRI R14:1015 85,6 (7393K)
CRI R15:1016 95,9 (7393K)
CRI Ra:1001 92,4 (7393K)
DC<5.4E-3:1018 false
X:1022 9,72
Y:1023 10,73
Z:1024 12,25
x:1026 0,2973
y:1027 0,3281
z:1028 0,3746
Spectrum 619: SW27 Edit
DeleteMeasurement
| Brand |
Arcadia UK company https://www.arcadiareptile.com/ |
|---|---|
| Lamp Product |
D3 Forest Lamp (6% UVB) T5 24W |
| Lamp ID |
SW27 (05/2022) donated by Arcadia |
| Spectrometer | USB2000+ |
| Ballast | - no ballast or default/unknown ballast - |
| Reflector | |
| Distance | 15 cm |
| Age | 100 hours |
| Originator (measurement) | Sarina Wunderlich |
Database entry created:
Sarina Wunderlich
18/Sep/2022 ; updated:
Thomas Griffiths (Tomaskas Ltd.)
15/Dec/2022
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 | ( 0.3 ; 0.33 ) | ( 0.48 ; 0.42 ) | ( 0.27 ; 0.35 ; 0.31 ) |
| CCT | 7400 Kelvin | 4000 Kelvin | 5100 Kelvin |
| distance | 0.089 | 0.096 | |
| 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) 3450 µW/cm² = 34.5 W/m² UVC ( 0 nm - 280 nm) 0.482 µW/cm² = 0.00482 W/m² non-terrestrial ( 0 nm - 290 nm) 2.27 µW/cm² = 0.0227 W/m² total2 ( 250 nm - 880 nm) 3450 µW/cm² = 34.5 W/m² UVB (EU) ( 280 nm - 315 nm) 106 µW/cm² = 1.06 W/m² UVB (US) ( 280 nm - 320 nm) 169 µW/cm² = 1.69 W/m² UVA+B ( 280 nm - 380 nm) 645 µW/cm² = 6.45 W/m² Solar UVB ( 290 nm - 315 nm) 105 µW/cm² = 1.05 W/m² UVA D3 regulating ( 315 nm - 335 nm) 256 µW/cm² = 2.56 W/m² UVA (EU) ( 315 nm - 380 nm) 538 µW/cm² = 5.38 W/m² UVA2 (medical definition) ( 320 nm - 340 nm) 256 µW/cm² = 2.56 W/m² UVA (US) ( 320 nm - 380 nm) 476 µW/cm² = 4.76 W/m² UVA1 (variant) ( 335 nm - 380 nm) 282 µW/cm² = 2.82 W/m² UVA1 (medical) ( 340 nm - 400 nm) 229 µW/cm² = 2.29 W/m² vis. UVA ( 350 nm - 380 nm) 112 µW/cm² = 1.12 W/m² VIS Rep3 ( 350 nm - 600 nm) 2310 µW/cm² = 23.1 W/m² VIS Rep4 ( 350 nm - 700 nm) 2860 µW/cm² = 28.6 W/m² purple ( 380 nm - 420 nm) 122 µW/cm² = 1.22 W/m² VIS ( 380 nm - 780 nm) 2800 µW/cm² = 28 W/m² PAR ( 400 nm - 700 nm) 2740 µW/cm² = 27.4 W/m² blue ( 420 nm - 490 nm) 898 µW/cm² = 8.98 W/m² green ( 490 nm - 575 nm) 980 µW/cm² = 9.8 W/m² yellow ( 575 nm - 585 nm) 98.7 µW/cm² = 0.987 W/m² orange ( 585 nm - 650 nm) 571 µW/cm² = 5.71 W/m² red ( 650 nm - 780 nm) 132 µW/cm² = 1.32 W/m² IRA ( 700 nm - 1400 nm) 55.6 µW/cm² = 0.556 W/m² IRB ( 1400 nm - 3000 nm) 0 µW/cm² = 0 W/m²
Actionspectra
Erythema 7.32 UV-Index Pyrimidine dimerization of DNA 64.5 µW/cm² Photoceratitis 11.6 µW/cm² Photoconjunctivitis 0.778 µW/cm² DNA Damage 1.81 Vitamin D3 29.1 µW/cm² Photosynthesis 1890 µW/cm² Luminosity 8370 lx Human L-Cone 1230 µW/cm² Human M-Cone 1090 µW/cm² Human S-Cone 695 µW/cm² CIE X 1050 µW/cm² CIE Y 1160 µW/cm² CIE Z 1320 µW/cm² PAR 12600000 mol photons Extinction preD3 194 e-3*m²/mol Extinction Tachysterol 689 e-3*m²/mol Exctincition PreD3 96600 m²/mol Extinction Lumisterol 41.7 m²/mol Exctincition Tachysterol 972000 m²/mol Extinction 7DHC 44.1 m²/mol L-Cone 987 µW/cm² M-Cone 1270 µW/cm² S-Cone 1110 µW/cm² U-Cone 275 µW/cm² UVR - ICNIRP 2004 6.9 Rel Biol Eff Melatonin Supression 1050 µW/cm² Blue Light Hazard 767 µW/cm² (91.6 µW/cm² per 1000 lx) CIE 174:2006 PreVit D3 31.8 µW/cm² Lumen Reptil 8580 "pseudo-lx" Vitamin D3 Degradation 33.7 µW/cm² Actinic UV 6.85 µW/cm² (8.18 mW/klm) Exctincition Lumisterol 56000 m²/mol Exctincition 7DHC 53900 m²/mol Exctincition Toxisterols 15200 m²/mol
Broadbandmeters
Solarmeter 6.2 (UVB, pre 2010) 201 µW/cm² Solarmeter 6.5 (UV-Index, pre 2010) 8.63 Leybold UVB 144 µW/cm² Leybold UVA 333 µW/cm² Leybold UVC 0.0811 µW/cm² DeltaOhm UVB 331 µW/cm² DeltaOhm UVC 41.5 µW/cm² Vernier UVB 50.6 µW/cm² Vernier UVA 407 µW/cm² Gröbel UVA 450 µW/cm² Gröbel UVB 74.2 µW/cm² Gröbel UVC 0.21 µW/cm² Solarmeter 6.4 (D3) 27 IU/min UVX-31 356 µW/cm² IL UVB 0.0845 µW/cm² IL UVA 373 µW/cm² Solarmeter 6.5 (UVI, post 2010) 6.88 UV-Index Solarmeter 6.2 (UVB, post 2010) 133 µW/cm² (Solarmeter Ratio = 19.3) Solarmeter AlGaN 6.5 UVI sensor 90.8 UV Index GenUV 7.1 UV-Index 5.07 UV-Index Solarmeter 10.0 (Global Power) 30.6 W/m² Solarmeter 4.0 (UVA) 4.83 mW/cm² LS122 0.000751 W/m² ISM400 18.5 W/m²