CCT:1019 7698K
CRI DC:1017 5,39E-3
CRI R01:1002 79,5 (7698K)
CRI R02:1003 82,2 (7698K)
CRI R03:1004 57,4 (7698K)
CRI R04:1005 83,8 (7698K)
CRI R05:1006 80,7 (7698K)
CRI R06:1007 69,0 (7698K)
CRI R07:1008 76,7 (7698K)
CRI R08:1009 70,5 (7698K)
CRI R09:1010 17,7 (7698K)
CRI R10:1011 35,3 (7698K)
CRI R11:1012 67,5 (7698K)
CRI R12:1013 60,8 (7698K)
CRI R13:1014 79,3 (7698K)
CRI R14:1015 73,3 (7698K)
CRI R15:1016 83,2 (7698K)
CRI Ra:1001 75,0 (7698K)
DC<5.4E-3:1018 true
X:1022 14,36
Y:1023 15,63
Z:1024 18,76
x:1026 0,2946
y:1027 0,3206
z:1028 0,3849
Spectrum 610: SW28 Edit
DeleteMeasurement
| Brand |
Arcadia UK company https://www.arcadiareptile.com/ |
|---|---|
| Lamp Product |
D3+ Dragon 14% Reptile Lamp T5 24W |
| Lamp ID |
SW28 (05/2022) donated by arcadia |
| Spectrometer | USB2000+ |
| Ballast | - no ballast or default/unknown ballast - |
| Reflector | |
| Distance | 5 cm |
| Age | 100 hours |
| Originator (measurement) | Sarina Wunderlich |
Database entry created:
Sarina Wunderlich
3/Sep/2022 ; updated:
Sarina Wunderlich
3/Sep/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 | ( 0.29 ; 0.32 ) | ( 0.36 ; 0.46 ) | ( 0.26 ; 0.26 ; 0.34 ) |
| CCT | 7700 Kelvin | 5800 Kelvin | 5700 Kelvin |
| distance | 0.12 | 0.088 | |
| 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) 7380 µW/cm² = 73.8 W/m² UVC ( 0 nm - 280 nm) 401 µW/cm² = 4.01 W/m² non-terrestrial ( 0 nm - 290 nm) 405 µW/cm² = 4.05 W/m² total2 ( 250 nm - 880 nm) 6980 µW/cm² = 69.8 W/m² UVB (EU) ( 280 nm - 315 nm) 448 µW/cm² = 4.48 W/m² UVB (US) ( 280 nm - 320 nm) 752 µW/cm² = 7.52 W/m² UVA+B ( 280 nm - 380 nm) 2970 µW/cm² = 29.7 W/m² Solar UVB ( 290 nm - 315 nm) 445 µW/cm² = 4.45 W/m² UVA D3 regulating ( 315 nm - 335 nm) 1260 µW/cm² = 12.6 W/m² UVA (EU) ( 315 nm - 380 nm) 2520 µW/cm² = 25.2 W/m² UVA2 (medical definition) ( 320 nm - 340 nm) 1260 µW/cm² = 12.6 W/m² UVA (US) ( 320 nm - 380 nm) 2220 µW/cm² = 22.2 W/m² UVA1 (variant) ( 335 nm - 380 nm) 1270 µW/cm² = 12.7 W/m² UVA1 (medical) ( 340 nm - 400 nm) 986 µW/cm² = 9.86 W/m² vis. UVA ( 350 nm - 380 nm) 442 µW/cm² = 4.42 W/m² VIS Rep3 ( 350 nm - 600 nm) 3720 µW/cm² = 37.2 W/m² VIS Rep4 ( 350 nm - 700 nm) 4390 µW/cm² = 43.9 W/m² purple ( 380 nm - 420 nm) 281 µW/cm² = 2.81 W/m² VIS ( 380 nm - 780 nm) 4000 µW/cm² = 40 W/m² PAR ( 400 nm - 700 nm) 3920 µW/cm² = 39.2 W/m² blue ( 420 nm - 490 nm) 1340 µW/cm² = 13.4 W/m² green ( 490 nm - 575 nm) 1330 µW/cm² = 13.3 W/m² yellow ( 575 nm - 585 nm) 181 µW/cm² = 1.81 W/m² orange ( 585 nm - 650 nm) 718 µW/cm² = 7.18 W/m² red ( 650 nm - 780 nm) 151 µW/cm² = 1.51 W/m² IRA ( 700 nm - 1400 nm) 61.3 µW/cm² = 0.613 W/m² IRB ( 1400 nm - 3000 nm) 0 µW/cm² = 0 W/m²
Actionspectra
Erythema 28.9 UV-Index Pyrimidine dimerization of DNA 281 µW/cm² Photoceratitis 44.1 µW/cm² Photoconjunctivitis 7.34 µW/cm² DNA Damage 10.6 Vitamin D3 114 µW/cm² Photosynthesis 2690 µW/cm² Luminosity 12100 lx Human L-Cone 1770 µW/cm² Human M-Cone 1580 µW/cm² Human S-Cone 1090 µW/cm² CIE X 1550 µW/cm² CIE Y 1690 µW/cm² CIE Z 2020 µW/cm² PAR 18400000 mol photons Extinction preD3 865 e-3*m²/mol Extinction Tachysterol 2990 e-3*m²/mol Exctincition PreD3 446000 m²/mol Extinction Lumisterol 173 m²/mol Exctincition Tachysterol 4270000 m²/mol Extinction 7DHC 173 m²/mol L-Cone 1440 µW/cm² M-Cone 1470 µW/cm² S-Cone 1900 µW/cm² U-Cone 750 µW/cm² UVR - ICNIRP 2004 27.3 Rel Biol Eff Melatonin Supression 1480 µW/cm² Blue Light Hazard 1240 µW/cm² (103 µW/cm² per 1000 lx) CIE 174:2006 PreVit D3 125 µW/cm² Lumen Reptil 12700 "pseudo-lx" Vitamin D3 Degradation 148 µW/cm² Actinic UV 27.1 µW/cm² (22.4 mW/klm) Exctincition Lumisterol 232000 m²/mol Exctincition 7DHC 205000 m²/mol Exctincition Toxisterols 86900 m²/mol
Broadbandmeters
Solarmeter 6.2 (UVB, pre 2010) 912 µW/cm² Solarmeter 6.5 (UV-Index, pre 2010) 34 Leybold UVB 643 µW/cm² Leybold UVA 1550 µW/cm² Leybold UVC 4.51 µW/cm² DeltaOhm UVB 1570 µW/cm² DeltaOhm UVC 195 µW/cm² Vernier UVB 211 µW/cm² Vernier UVA 1940 µW/cm² Gröbel UVA 2100 µW/cm² Gröbel UVB 318 µW/cm² Gröbel UVC 5.39 µW/cm² Solarmeter 6.4 (D3) 106 IU/min UVX-31 1680 µW/cm² IL UVB 0.381 µW/cm² IL UVA 1710 µW/cm² Solarmeter 6.5 (UVI, post 2010) 28.3 UV-Index Solarmeter 6.2 (UVB, post 2010) 615 µW/cm² (Solarmeter Ratio = 21.8) Solarmeter AlGaN 6.5 UVI sensor 390 UV Index GenUV 7.1 UV-Index 22.3 UV-Index Solarmeter 10.0 (Global Power) 50.9 W/m² Solarmeter 4.0 (UVA) 21.7 mW/cm² LS122 0.00227 W/m² ISM400 25.8 W/m²