Spectrum #618 SW27 (Arcadia Arcadia D3 Forest Lamp (6% UVB) T5 24W) Edit
Delete(1) Raw Measurement
| Lampid | SW27 |
|---|---|
| Spectrometer | USB2000+ |
| Originator | Sarina Wunderlich |
| Ballast | - no ballast or default/unknown ballast - |
| Reflector | Arcadia ProT5 HO T5 UV-B Lighting Kit |
| Distance | 5 |
| Age | 100 |
created by Sarina Wunderlich, 18.09.2022; last updated by Sarina Wunderlich, 18.09.2022
Description
Seite mit Beschriftung
CCT:1019 7140K
CRI DC:1017 6,27E-3
CRI R01:1002 94,9 (7140K)
CRI R02:1003 93,2 (7140K)
CRI R03:1004 76,6 (7140K)
CRI R04:1005 94,2 (7140K)
CRI R05:1006 97,1 (7140K)
CRI R06:1007 98,0 (7140K)
CRI R07:1008 94,8 (7140K)
CRI R08:1009 87,1 (7140K)
CRI R09:1010 63,6 (7140K)
CRI R10:1011 77,3 (7140K)
CRI R11:1012 94,3 (7140K)
CRI R12:1013 92,6 (7140K)
CRI R13:1014 90,3 (7140K)
CRI R14:1015 84,2 (7140K)
CRI R15:1016 96,8 (7140K)
CRI Ra:1001 92,0 (7140K)
DC<5.4E-3:1018 false
X:1022 18,98
Y:1023 20,77
Z:1024 23,26
x:1026 0,3012
y:1027 0,3296
z:1028 0,3691
(2) Comparison of full spectrum to sunlight
The spectrum is compared to the ASTM spectrum. The measured spectrum is scaled to a lux or UVI value that seems to "make sense" to the database. This can go wrong, depending on the quality and range of the data.
(3) 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 (ASTM spectrum).
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 ) | ( 0.47 ; 0.42 ) | ( 0.27 ; 0.34 ; 0.3 ) |
| CCT | 7100 Kelvin | 4100 Kelvin | 5000 Kelvin |
| distance | 0.088 | 0.09 | |
| colour space | 3-D-graph not implemented yet |
(4) 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 readings of two solarmeters 6.2 (UVB) and 6.5 (UV index) has proven a useful and very simply number to acess the spectral shape in the vitamin-d3-active region.
(5) 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
(5a) Ranges
total ( 0 nm - 0 nm) 6820 µW/cm² = 68.2 W/m² UVC ( 0 nm - 280 nm) 1.05 µW/cm² = 0.0105 W/m² non-terrestrial ( 0 nm - 290 nm) 4.99 µW/cm² = 0.0499 W/m² total2 ( 250 nm - 880 nm) 6830 µW/cm² = 68.3 W/m² UVB (EU) ( 280 nm - 315 nm) 239 µW/cm² = 2.39 W/m² UVB (US) ( 280 nm - 320 nm) 378 µW/cm² = 3.78 W/m² UVA+B ( 280 nm - 380 nm) 1420 µW/cm² = 14.2 W/m² Solar UVB ( 290 nm - 315 nm) 235 µW/cm² = 2.35 W/m² UVA D3 regulating ( 315 nm - 335 nm) 567 µW/cm² = 5.67 W/m² UVA (EU) ( 315 nm - 380 nm) 1180 µW/cm² = 11.8 W/m² UVA2 (medical definition) ( 320 nm - 340 nm) 564 µW/cm² = 5.64 W/m² UVA (US) ( 320 nm - 380 nm) 1040 µW/cm² = 10.4 W/m² UVA1 (variant) ( 335 nm - 380 nm) 611 µW/cm² = 6.11 W/m² UVA1 (medical) ( 340 nm - 400 nm) 494 µW/cm² = 4.94 W/m² vis. UVA ( 350 nm - 380 nm) 241 µW/cm² = 2.41 W/m² VIS Rep3 ( 350 nm - 600 nm) 4450 µW/cm² = 44.5 W/m² VIS Rep4 ( 350 nm - 700 nm) 5530 µW/cm² = 55.3 W/m² purple ( 380 nm - 420 nm) 243 µW/cm² = 2.43 W/m² VIS ( 380 nm - 780 nm) 5390 µW/cm² = 53.9 W/m² VIS2 ( 400 nm - 680 nm) 5220 µW/cm² = 52.2 W/m² PAR ( 400 nm - 700 nm) 5270 µW/cm² = 52.7 W/m² tmp ( 400 nm - 1100 nm) 5390 µW/cm² = 53.9 W/m² blue ( 420 nm - 490 nm) 1700 µW/cm² = 17 W/m² green ( 490 nm - 575 nm) 1870 µW/cm² = 18.7 W/m² yellow ( 575 nm - 585 nm) 194 µW/cm² = 1.94 W/m² orange ( 585 nm - 650 nm) 1120 µW/cm² = 11.2 W/m² red ( 650 nm - 780 nm) 263 µW/cm² = 2.63 W/m² IR2 ( 655 nm - 685 nm) 96.9 µW/cm² = 0.969 W/m² IRA ( 700 nm - 1400 nm) 118 µW/cm² = 1.18 W/m² IRB ( 1400 nm - 3000 nm) 0 µW/cm² = 0 W/m²
(5b) Actionspectra
Erythema 16.3 UV-Index Pyrimidine dimerization of DNA 145 µW/cm² Photoceratitis 26.1 µW/cm² Photoconjunctivitis 1.69 µW/cm² DNA Damage 3.96 Vitamin D3 65.2 µW/cm² Photosynthesis 3620 µW/cm² Luminosity 16200 lx Human L-Cone 2380 µW/cm² Human M-Cone 2090 µW/cm² Human S-Cone 1320 µW/cm² CIE X 2050 µW/cm² CIE Y 2240 µW/cm² CIE Z 2510 µW/cm² PAR PPFD 244 µmol/m²/s Extinction preD3 434 e-3*m²/mol Extinction Tachysterol 1540 e-3*m²/mol Exctincition PreD3 215000 m²/mol Extinction Lumisterol 92.2 m²/mol Exctincition Tachysterol 2170000 m²/mol Extinction 7DHC 96.8 m²/mol L-Cone 1920 µW/cm² M-Cone 2380 µW/cm² S-Cone 2130 µW/cm² U-Cone 564 µW/cm² UVR - ICNIRP 2004 15.3 Rel Biol Eff Melatonin Supression 1980 µW/cm² Blue Light Hazard 1460 µW/cm² (90.3 µW/cm² per 1000 lx) CIE 174:2006 PreVit D3 71.3 µW/cm² Lumen Reptil 16500 "pseudo-lx" Vitamin D3 Degradation 75.4 µW/cm² Actinic UV 15.2 µW/cm² (9.41 mW/klm) Exctincition Lumisterol 124000 m²/mol Exctincition 7DHC 119000 m²/mol Exctincition Toxisterols 33900 m²/mol
(5c) Broadbandmeters
Solarmeter 6.2 (UVB, pre 2010) 450 µW/cm² Solarmeter 6.5 (UV-Index, pre 2010) 19.3 Leybold UVB 322 µW/cm² Leybold UVA 725 µW/cm² Leybold UVC 0.206 µW/cm² DeltaOhm UVB 737 µW/cm² DeltaOhm UVC 92.7 µW/cm² Vernier UVB 113 µW/cm² Vernier UVA 895 µW/cm² Gröbel UVA 985 µW/cm² Gröbel UVB 166 µW/cm² Gröbel UVC 0.476 µW/cm² Luxmeter 16600 lx Solarmeter 6.4 (D3) 60.3 IU/min UVX-31 791 µW/cm² IL UVB 0.189 µW/cm² IL UVA 812 µW/cm² Solarmeter 6.5 (UVI, post 2010) 15.4 UV-Index Solarmeter 6.2 (UVB, post 2010) 297 µW/cm² (Solarmeter Ratio = 19.3) Solarmeter AlGaN 6.5 UVI sensor 204 UV Index GenUV 7.1 UV-Index 11.4 UV-Index Solarmeter 10.0 (Global Power) (manuf.) 59.9 W/m² Solarmeter 4.0 (UVA) 10.5 mW/cm² LS122 (manuf.) 0.0114 W/m² ISM400 (first guess) 36 W/m² LS122 (assumption) 1.69 W/m² ISM400_new 28.1 W/m² Solarmeter 10.0 (Global Power) (assumption) 54.2 W/m²
(5d) Summary of my favourites
| UVC (0nm -280nm) [µW/cm] | 1.05 | 0.0154 % |
| non-terrestrial (0nm -290nm) [µW/cm] | 4.99 | 0.0732 % |
| UVB (EU) (280nm -315nm) [µW/cm] | 239 | 3.51 % |
| UVB (US) (280nm -320nm) [µW/cm] | 378 | 5.54 % |
| Solar UVB (290nm -315nm) [µW/cm] | 235 | 3.45 % |
| UVA (EU) (315nm -380nm) [µW/cm] | 1180 | 17.3 % |
| UVA (US) (320nm -380nm) [µW/cm] | 1040 | 15.2 % |
| UVA2 (medical definition) (320nm -340nm) [µW/cm] | 564 | 8.26 % |
| UVA1 (medical) (340nm -400nm) [µW/cm] | 494 | 7.24 % |
| UVA D3 regulating (315nm -335nm) [µW/cm] | 567 | 8.3 % |
| vis. UVA (350nm -380nm) [µW/cm] | 241 | 3.53 % |
| VIS (380nm -780nm) [µW/cm] | 5390 | 79 % |
| blue (420nm -490nm) [µW/cm] | 1700 | 24.9 % |
| total2 (250nm -880nm) [µW/cm] | 6830 | 100 % |
| Erythema [UV-Index] | 16.3 | |
| Luminosity [lx] | 16200 | |
| Blue Light Hazard [µW/cm²] | 1460 | 90.3µW/cm/1000lx |
| Solarmeter 6.5 (UVI, post 2010) [UV-Index] | 15.4 | |
| Solarmeter 6.2 (UVB, post 2010) [µW/cm²] | 297 | |
| Actinic UV [µW/cm²] | 15.2 | 7.08 at UVI7.6 |
| Vitamin D3 [µW/cm²] | 65.2 | 30.3 at UVI7.6 |