Spectrum #617 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 ohne BEschriftung
CCT:1019 7493K
CRI DC:1017 7,94E-3
CRI R01:1002 94,7 (7493K)
CRI R02:1003 92,8 (7493K)
CRI R03:1004 79,5 (7493K)
CRI R04:1005 95,0 (7493K)
CRI R05:1006 96,9 (7493K)
CRI R06:1007 98,2 (7493K)
CRI R07:1008 95,4 (7493K)
CRI R08:1009 87,2 (7493K)
CRI R09:1010 63,9 (7493K)
CRI R10:1011 79,8 (7493K)
CRI R11:1012 93,9 (7493K)
CRI R12:1013 93,8 (7493K)
CRI R13:1014 89,5 (7493K)
CRI R14:1015 86,1 (7493K)
CRI R15:1016 95,6 (7493K)
CRI Ra:1001 92,5 (7493K)
DC<5.4E-3:1018 false
X:1022 19,38
Y:1023 21,43
Z:1024 24,68
x:1026 0,2959
y:1027 0,3273
z:1028 0,3768
(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 ) | ( 0.48 ; 0.42 ) | ( 0.27 ; 0.35 ; 0.31 ) |
| CCT | 7400 Kelvin | 4000 Kelvin | 5100 Kelvin |
| distance | 0.088 | 0.096 | |
| 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) 7150 µW/cm² = 71.5 W/m² UVC ( 0 nm - 280 nm) 2.8 µW/cm² = 0.028 W/m² non-terrestrial ( 0 nm - 290 nm) 6.31 µW/cm² = 0.0631 W/m² total2 ( 250 nm - 880 nm) 7140 µW/cm² = 71.4 W/m² UVB (EU) ( 280 nm - 315 nm) 221 µW/cm² = 2.21 W/m² UVB (US) ( 280 nm - 320 nm) 352 µW/cm² = 3.52 W/m² UVA+B ( 280 nm - 380 nm) 1350 µW/cm² = 13.5 W/m² Solar UVB ( 290 nm - 315 nm) 218 µW/cm² = 2.18 W/m² UVA D3 regulating ( 315 nm - 335 nm) 536 µW/cm² = 5.36 W/m² UVA (EU) ( 315 nm - 380 nm) 1130 µW/cm² = 11.3 W/m² UVA2 (medical definition) ( 320 nm - 340 nm) 536 µW/cm² = 5.36 W/m² UVA (US) ( 320 nm - 380 nm) 996 µW/cm² = 9.96 W/m² UVA1 (variant) ( 335 nm - 380 nm) 591 µW/cm² = 5.91 W/m² UVA1 (medical) ( 340 nm - 400 nm) 481 µW/cm² = 4.81 W/m² vis. UVA ( 350 nm - 380 nm) 235 µW/cm² = 2.35 W/m² VIS Rep3 ( 350 nm - 600 nm) 4770 µW/cm² = 47.7 W/m² VIS Rep4 ( 350 nm - 700 nm) 5900 µW/cm² = 59 W/m² purple ( 380 nm - 420 nm) 251 µW/cm² = 2.51 W/m² VIS ( 380 nm - 780 nm) 5770 µW/cm² = 57.7 W/m² VIS2 ( 400 nm - 680 nm) 5590 µW/cm² = 55.9 W/m² PAR ( 400 nm - 700 nm) 5640 µW/cm² = 56.4 W/m² tmp ( 400 nm - 1100 nm) 5780 µW/cm² = 57.8 W/m² blue ( 420 nm - 490 nm) 1850 µW/cm² = 18.5 W/m² green ( 490 nm - 575 nm) 2010 µW/cm² = 20.1 W/m² yellow ( 575 nm - 585 nm) 202 µW/cm² = 2.02 W/m² orange ( 585 nm - 650 nm) 1180 µW/cm² = 11.8 W/m² red ( 650 nm - 780 nm) 275 µW/cm² = 2.75 W/m² IR2 ( 655 nm - 685 nm) 102 µW/cm² = 1.02 W/m² IRA ( 700 nm - 1400 nm) 132 µW/cm² = 1.32 W/m² IRB ( 1400 nm - 3000 nm) 0 µW/cm² = 0 W/m²
(5b) Actionspectra
Erythema 15.8 UV-Index Pyrimidine dimerization of DNA 134 µW/cm² Photoceratitis 25 µW/cm² Photoconjunctivitis 2.68 µW/cm² DNA Damage 5.08 Vitamin D3 60.7 µW/cm² Photosynthesis 3890 µW/cm² Luminosity 17200 lx Human L-Cone 2520 µW/cm² Human M-Cone 2240 µW/cm² Human S-Cone 1430 µW/cm² CIE X 2160 µW/cm² CIE Y 2380 µW/cm² CIE Z 2730 µW/cm² PAR PPFD 260 µmol/m²/s Extinction preD3 417 e-3*m²/mol Extinction Tachysterol 1470 e-3*m²/mol Exctincition PreD3 213000 m²/mol Extinction Lumisterol 99.3 m²/mol Exctincition Tachysterol 2070000 m²/mol Extinction 7DHC 106 m²/mol L-Cone 2030 µW/cm² M-Cone 2610 µW/cm² S-Cone 2290 µW/cm² U-Cone 570 µW/cm² UVR - ICNIRP 2004 15.9 Rel Biol Eff Melatonin Supression 2160 µW/cm² Blue Light Hazard 1580 µW/cm² (91.8 µW/cm² per 1000 lx) CIE 174:2006 PreVit D3 66.2 µW/cm² Lumen Reptil 17700 "pseudo-lx" Vitamin D3 Degradation 71.5 µW/cm² Actinic UV 15.8 µW/cm² (9.2 mW/klm) Exctincition Lumisterol 131000 m²/mol Exctincition 7DHC 126000 m²/mol Exctincition Toxisterols 33000 m²/mol
(5c) Broadbandmeters
Solarmeter 6.2 (UVB, pre 2010) 422 µW/cm² Solarmeter 6.5 (UV-Index, pre 2010) 18.3 Leybold UVB 299 µW/cm² Leybold UVA 698 µW/cm² Leybold UVC 0.901 µW/cm² DeltaOhm UVB 693 µW/cm² DeltaOhm UVC 87.5 µW/cm² Vernier UVB 104 µW/cm² Vernier UVA 853 µW/cm² Gröbel UVA 943 µW/cm² Gröbel UVB 155 µW/cm² Gröbel UVC 1.47 µW/cm² Luxmeter 17700 lx Solarmeter 6.4 (D3) 57.3 IU/min UVX-31 745 µW/cm² IL UVB 0.177 µW/cm² IL UVA 780 µW/cm² Solarmeter 6.5 (UVI, post 2010) 14.4 UV-Index Solarmeter 6.2 (UVB, post 2010) 278 µW/cm² (Solarmeter Ratio = 19.3) Solarmeter AlGaN 6.5 UVI sensor 190 UV Index GenUV 7.1 UV-Index 10.6 UV-Index Solarmeter 10.0 (Global Power) (manuf.) 63.4 W/m² Solarmeter 4.0 (UVA) 10.1 mW/cm² LS122 (manuf.) 0.0501 W/m² ISM400 (first guess) 38.4 W/m² LS122 (assumption) 1.81 W/m² ISM400_new 30 W/m² Solarmeter 10.0 (Global Power) (assumption) 57.7 W/m²
(5d) Summary of my favourites
| UVC (0nm -280nm) [µW/cm] | 2.8 | 0.0393 % |
| non-terrestrial (0nm -290nm) [µW/cm] | 6.31 | 0.0884 % |
| UVB (EU) (280nm -315nm) [µW/cm] | 221 | 3.1 % |
| UVB (US) (280nm -320nm) [µW/cm] | 352 | 4.93 % |
| Solar UVB (290nm -315nm) [µW/cm] | 218 | 3.05 % |
| UVA (EU) (315nm -380nm) [µW/cm] | 1130 | 15.8 % |
| UVA (US) (320nm -380nm) [µW/cm] | 996 | 14 % |
| UVA2 (medical definition) (320nm -340nm) [µW/cm] | 536 | 7.5 % |
| UVA1 (medical) (340nm -400nm) [µW/cm] | 481 | 6.73 % |
| UVA D3 regulating (315nm -335nm) [µW/cm] | 536 | 7.5 % |
| vis. UVA (350nm -380nm) [µW/cm] | 235 | 3.28 % |
| VIS (380nm -780nm) [µW/cm] | 5770 | 80.8 % |
| blue (420nm -490nm) [µW/cm] | 1850 | 25.9 % |
| total2 (250nm -880nm) [µW/cm] | 7140 | 100 % |
| Erythema [UV-Index] | 15.8 | |
| Luminosity [lx] | 17200 | |
| Blue Light Hazard [µW/cm²] | 1580 | 91.8µW/cm/1000lx |
| Solarmeter 6.5 (UVI, post 2010) [UV-Index] | 14.4 | |
| Solarmeter 6.2 (UVB, post 2010) [µW/cm²] | 278 | |
| Actinic UV [µW/cm²] | 15.8 | 7.6 at UVI7.6 |
| Vitamin D3 [µW/cm²] | 60.7 | 29.1 at UVI7.6 |