Spectrum #603 SW31 (Sera Reptil compact 10% 20W desert ) Edit
Delete(1) Raw Measurement
| Lampid | SW31 |
|---|---|
| Spectrometer | USB2000+ |
| Originator | Sarina Wunderlich |
| Ballast | - no ballast or default/unknown ballast - |
| Reflector | - no reflector - |
| Distance | 10 |
| Age | 500 |
created by Sarina Wunderlich, 26.07.2022; last updated by Sarina Wunderlich, 26.07.2022
Description
with REBIE TerraClear-Glas®
unknown age of the lampCCT:1019 7889K
CRI DC:1017 1,05E-2
CRI R01:1002 56,3 (7889K)
CRI R02:1003 70,5 (7889K)
CRI R03:1004 71,3 (7889K)
CRI R04:1005 62,4 (7889K)
CRI R05:1006 59,1 (7889K)
CRI R06:1007 52,3 (7889K)
CRI R07:1008 66,9 (7889K)
CRI R08:1009 51,0 (7889K)
CRI R09:1010 -59,8 (7889K)
CRI R10:1011 21,3 (7889K)
CRI R11:1012 50,5 (7889K)
CRI R12:1013 46,7 (7889K)
CRI R13:1014 60,4 (7889K)
CRI R14:1015 83,5 (7889K)
CRI R15:1016 51,4 (7889K)
CRI Ra:1001 61,2 (7889K)
DC<5.4E-3:1018 false
X:1022 2,60
Y:1023 2,92
Z:1024 3,44
x:1026 0,2900
y:1027 0,3260
z:1028 0,3840
(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 | ( 0.29 ; 0.33 ) | ( 0.29 ; 0.44 ) | ( 0.24 ; 0.22 ; 0.34 ) |
| CCT | 7900 Kelvin | 7600 Kelvin | 6600 Kelvin |
| distance | 0.1 | 0.08 | |
| 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) 1200 µW/cm² = 12 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) 1200 µW/cm² = 12 W/m² UVB (EU) ( 280 nm - 315 nm) 67.4 µW/cm² = 0.674 W/m² UVB (US) ( 280 nm - 320 nm) 102 µW/cm² = 1.02 W/m² UVA+B ( 280 nm - 380 nm) 387 µW/cm² = 3.87 W/m² Solar UVB ( 290 nm - 315 nm) 67.4 µW/cm² = 0.674 W/m² UVA D3 regulating ( 315 nm - 335 nm) 142 µW/cm² = 1.42 W/m² UVA (EU) ( 315 nm - 380 nm) 320 µW/cm² = 3.2 W/m² UVA2 (medical definition) ( 320 nm - 340 nm) 140 µW/cm² = 1.4 W/m² UVA (US) ( 320 nm - 380 nm) 285 µW/cm² = 2.85 W/m² UVA1 (variant) ( 335 nm - 380 nm) 178 µW/cm² = 1.78 W/m² UVA1 (medical) ( 340 nm - 400 nm) 165 µW/cm² = 1.65 W/m² vis. UVA ( 350 nm - 380 nm) 85.5 µW/cm² = 0.855 W/m² VIS Rep3 ( 350 nm - 600 nm) 748 µW/cm² = 7.48 W/m² VIS Rep4 ( 350 nm - 700 nm) 862 µW/cm² = 8.62 W/m² purple ( 380 nm - 420 nm) 92 µW/cm² = 0.92 W/m² VIS ( 380 nm - 780 nm) 805 µW/cm² = 8.05 W/m² VIS2 ( 400 nm - 680 nm) 740 µW/cm² = 7.4 W/m² PAR ( 400 nm - 700 nm) 756 µW/cm² = 7.56 W/m² tmp ( 400 nm - 1100 nm) 794 µW/cm² = 7.94 W/m² blue ( 420 nm - 490 nm) 235 µW/cm² = 2.35 W/m² green ( 490 nm - 575 nm) 256 µW/cm² = 2.56 W/m² yellow ( 575 nm - 585 nm) 48.8 µW/cm² = 0.488 W/m² orange ( 585 nm - 650 nm) 98.8 µW/cm² = 0.988 W/m² red ( 650 nm - 780 nm) 74 µW/cm² = 0.74 W/m² IR2 ( 655 nm - 685 nm) 28.6 µW/cm² = 0.286 W/m² IRA ( 700 nm - 1400 nm) 38.5 µW/cm² = 0.385 W/m² IRB ( 1400 nm - 3000 nm) 0 µW/cm² = 0 W/m²
(5b) Actionspectra
Erythema 4.2 UV-Index Pyrimidine dimerization of DNA 40.1 µW/cm² Photoceratitis 6.63 µW/cm² Photoconjunctivitis 0.131 µW/cm² DNA Damage 0.458 Vitamin D3 17.9 µW/cm² Photosynthesis 518 µW/cm² Luminosity 2260 lx Human L-Cone 329 µW/cm² Human M-Cone 297 µW/cm² Human S-Cone 205 µW/cm² CIE X 281 µW/cm² CIE Y 316 µW/cm² CIE Z 372 µW/cm² PAR PPFD 36.6 µmol/m²/s Extinction preD3 113 e-3*m²/mol Extinction Tachysterol 399 e-3*m²/mol Exctincition PreD3 53000 m²/mol Extinction Lumisterol 18.2 m²/mol Exctincition Tachysterol 559000 m²/mol Extinction 7DHC 17.4 m²/mol L-Cone 268 µW/cm² M-Cone 248 µW/cm² S-Cone 376 µW/cm² U-Cone 225 µW/cm² UVR - ICNIRP 2004 3.42 Rel Biol Eff Melatonin Supression 271 µW/cm² Blue Light Hazard 235 µW/cm² (104 µW/cm² per 1000 lx) CIE 174:2006 PreVit D3 19.7 µW/cm² Lumen Reptil 2480 "pseudo-lx" Vitamin D3 Degradation 19.8 µW/cm² Actinic UV 3.39 µW/cm² (15 mW/klm) Exctincition Lumisterol 25900 m²/mol Exctincition 7DHC 22500 m²/mol Exctincition Toxisterols 8630 m²/mol
(5c) Broadbandmeters
Solarmeter 6.2 (UVB, pre 2010) 120 µW/cm² Solarmeter 6.5 (UV-Index, pre 2010) 5.1 Leybold UVB 87.7 µW/cm² Leybold UVA 200 µW/cm² Leybold UVC 0.00851 µW/cm² DeltaOhm UVB 191 µW/cm² DeltaOhm UVC 24 µW/cm² Vernier UVB 31.6 µW/cm² Vernier UVA 234 µW/cm² Gröbel UVA 268 µW/cm² Gröbel UVB 45.3 µW/cm² Gröbel UVC -0.0322 µW/cm² Luxmeter 2390 lx Solarmeter 6.4 (D3) 16 IU/min UVX-31 206 µW/cm² IL UVB 0.0499 µW/cm² IL UVA 228 µW/cm² Solarmeter 6.5 (UVI, post 2010) 4.19 UV-Index Solarmeter 6.2 (UVB, post 2010) 78.3 µW/cm² (Solarmeter Ratio = 18.7) Solarmeter AlGaN 6.5 UVI sensor 56.5 UV Index GenUV 7.1 UV-Index 3.1 UV-Index Solarmeter 10.0 (Global Power) (manuf.) 9.58 W/m² Solarmeter 4.0 (UVA) 3.07 mW/cm² LS122 (manuf.) 0.015 W/m² ISM400 (first guess) 5.52 W/m² LS122 (assumption) 0.26 W/m² ISM400_new 4.42 W/m² Solarmeter 10.0 (Global Power) (assumption) 8.24 W/m²
(5d) Summary of my favourites
| UVC (0nm -280nm) [µW/cm] | 0 | 0 % |
| non-terrestrial (0nm -290nm) [µW/cm] | 0 | 0 % |
| UVB (EU) (280nm -315nm) [µW/cm] | 67.4 | 5.61 % |
| UVB (US) (280nm -320nm) [µW/cm] | 102 | 8.53 % |
| Solar UVB (290nm -315nm) [µW/cm] | 67.4 | 5.61 % |
| UVA (EU) (315nm -380nm) [µW/cm] | 320 | 26.6 % |
| UVA (US) (320nm -380nm) [µW/cm] | 285 | 23.7 % |
| UVA2 (medical definition) (320nm -340nm) [µW/cm] | 140 | 11.7 % |
| UVA1 (medical) (340nm -400nm) [µW/cm] | 165 | 13.7 % |
| UVA D3 regulating (315nm -335nm) [µW/cm] | 142 | 11.8 % |
| vis. UVA (350nm -380nm) [µW/cm] | 85.5 | 7.12 % |
| VIS (380nm -780nm) [µW/cm] | 805 | 67 % |
| blue (420nm -490nm) [µW/cm] | 235 | 19.6 % |
| total2 (250nm -880nm) [µW/cm] | 1200 | 100 % |
| Erythema [UV-Index] | 4.2 | |
| Luminosity [lx] | 2260 | |
| Blue Light Hazard [µW/cm²] | 235 | 104µW/cm/1000lx |
| Solarmeter 6.5 (UVI, post 2010) [UV-Index] | 4.19 | |
| Solarmeter 6.2 (UVB, post 2010) [µW/cm²] | 78.3 | |
| Actinic UV [µW/cm²] | 3.39 | 6.13 at UVI7.6 |
| Vitamin D3 [µW/cm²] | 17.9 | 32.5 at UVI7.6 |