Spectrum #649 SW49 (Ledvance Sun@Home Classic A40 E27) Edit
Delete(1) Raw Measurement
| Lampid | SW49 |
|---|---|
| Spectrometer | USB2000+ |
| Originator | Sarina Wunderlich |
| Ballast | - no ballast or default/unknown ballast - |
| Reflector | - no reflector - |
| Distance | 5 |
| Age | 0 |
created by Sarina Wunderlich, 13.01.2023; last updated by Sarina Wunderlich, 13.01.2023
Description
Colour Setting 5/6
CRI R01:1002 97,3 (3848K)
CRI R02:1003 97,9 (3848K)
CRI R03:1004 98,4 (3848K)
CRI R04:1005 97,8 (3848K)
CRI R05:1006 97,3 (3848K)
CRI R06:1007 95,3 (3848K)
CRI R07:1008 97,1 (3848K)
CRI R08:1009 97,7 (3848K)
CRI R09:1010 96,2 (3848K)
CRI R10:1011 97,1 (3848K)
CRI R11:1012 95,2 (3848K)
CRI R12:1013 88,7 (3848K)
CRI R13:1014 97,2 (3848K)
CRI R14:1015 98,5 (3848K)
CRI R15:1016 97,8 (3848K)
CRI Ra:1001 97,4 (3848K)
DC<5.4E-3:1018 true
(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 | ( 0.38 ; 0.37 ) | ( 0.57 ; 0.41 ) | ( 0.43 ; 0.32 ; 0.23 ) |
| CCT | 3800 Kelvin | 3300 Kelvin | 3500 Kelvin |
| distance | 0.1 | 0.06 | |
| 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) 2840 µW/cm² = 28.4 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) 2840 µW/cm² = 28.4 W/m² UVB (EU) ( 280 nm - 315 nm) 0 µW/cm² = 0 W/m² UVB (US) ( 280 nm - 320 nm) 0 µW/cm² = 0 W/m² UVA+B ( 280 nm - 380 nm) 1.28 µW/cm² = 0.0128 W/m² Solar UVB ( 290 nm - 315 nm) 0 µW/cm² = 0 W/m² UVA D3 regulating ( 315 nm - 335 nm) 0 µW/cm² = 0 W/m² UVA (EU) ( 315 nm - 380 nm) 1.28 µW/cm² = 0.0128 W/m² UVA2 (medical definition) ( 320 nm - 340 nm) 0 µW/cm² = 0 W/m² UVA (US) ( 320 nm - 380 nm) 1.28 µW/cm² = 0.0128 W/m² UVA1 (variant) ( 335 nm - 380 nm) 1.28 µW/cm² = 0.0128 W/m² UVA1 (medical) ( 340 nm - 400 nm) 2.16 µW/cm² = 0.0216 W/m² vis. UVA ( 350 nm - 380 nm) 1.17 µW/cm² = 0.0117 W/m² VIS Rep3 ( 350 nm - 600 nm) 1580 µW/cm² = 15.8 W/m² VIS Rep4 ( 350 nm - 700 nm) 2650 µW/cm² = 26.5 W/m² purple ( 380 nm - 420 nm) 19.6 µW/cm² = 0.196 W/m² VIS ( 380 nm - 780 nm) 2820 µW/cm² = 28.2 W/m² VIS2 ( 400 nm - 680 nm) 2520 µW/cm² = 25.2 W/m² PAR ( 400 nm - 700 nm) 2650 µW/cm² = 26.5 W/m² tmp ( 400 nm - 1100 nm) 2840 µW/cm² = 28.4 W/m² blue ( 420 nm - 490 nm) 481 µW/cm² = 4.81 W/m² green ( 490 nm - 575 nm) 792 µW/cm² = 7.92 W/m² yellow ( 575 nm - 585 nm) 111 µW/cm² = 1.11 W/m² orange ( 585 nm - 650 nm) 817 µW/cm² = 8.17 W/m² red ( 650 nm - 780 nm) 600 µW/cm² = 6 W/m² IR2 ( 655 nm - 685 nm) 279 µW/cm² = 2.79 W/m² IRA ( 700 nm - 1400 nm) 195 µW/cm² = 1.95 W/m² IRB ( 1400 nm - 3000 nm) 0 µW/cm² = 0 W/m²
(5b) Actionspectra
Erythema 0.000291 UV-Index Pyrimidine dimerization of DNA 0.000278 µW/cm² Photoceratitis 0 µW/cm² Photoconjunctivitis 0 µW/cm² DNA Damage 1.03E-6 Vitamin D3 0 µW/cm² Photosynthesis 1810 µW/cm² Luminosity 7980 lx Human L-Cone 1230 µW/cm² Human M-Cone 926 µW/cm² Human S-Cone 383 µW/cm² CIE X 1150 µW/cm² CIE Y 1110 µW/cm² CIE Z 744 µW/cm² PAR PPFD 126 µmol/m²/s Extinction preD3 0 e-3*m²/mol Extinction Tachysterol 0 e-3*m²/mol Exctincition PreD3 1.48 m²/mol Extinction Lumisterol 0 m²/mol Exctincition Tachysterol 27.4 m²/mol Extinction 7DHC 0 m²/mol L-Cone 1090 µW/cm² M-Cone 818 µW/cm² S-Cone 582 µW/cm² U-Cone 28.1 µW/cm² UVR - ICNIRP 2004 0.000198 Rel Biol Eff Melatonin Supression 585 µW/cm² Blue Light Hazard 414 µW/cm² (51.8 µW/cm² per 1000 lx) CIE 174:2006 PreVit D3 0 µW/cm² Lumen Reptil 6470 "pseudo-lx" Vitamin D3 Degradation 0 µW/cm² Actinic UV 0.000198 µW/cm² (0.000248 mW/klm) Exctincition Lumisterol 0 m²/mol Exctincition 7DHC 0 m²/mol Exctincition Toxisterols 1.47 m²/mol
(5c) Broadbandmeters
Solarmeter 6.2 (UVB, pre 2010) 0.00784 µW/cm² Solarmeter 6.5 (UV-Index, pre 2010) 0.000103 Leybold UVB 0 µW/cm² Leybold UVA 1.04 µW/cm² Leybold UVC 0 µW/cm² DeltaOhm UVB 0.00246 µW/cm² DeltaOhm UVC 0 µW/cm² Vernier UVB 0 µW/cm² Vernier UVA 0.48 µW/cm² Gröbel UVA 1.07 µW/cm² Gröbel UVB 0.000331 µW/cm² Gröbel UVC 0 µW/cm² Luxmeter 7860 lx Solarmeter 6.4 (D3) 0.000323 IU/min UVX-31 0.0681 µW/cm² IL UVB 5.78E-6 µW/cm² IL UVA 1.26 µW/cm² Solarmeter 6.5 (UVI, post 2010) 4.28E-5 UV-Index Solarmeter 6.2 (UVB, post 2010) 0.000427 µW/cm² (Solarmeter Ratio = 9.97) Solarmeter AlGaN 6.5 UVI sensor 0.000371 UV Index GenUV 7.1 UV-Index 0.000359 UV-Index Solarmeter 10.0 (Global Power) (manuf.) 33 W/m² Solarmeter 4.0 (UVA) 0.0227 mW/cm² LS122 (manuf.) 0.025 W/m² ISM400 (first guess) 26.1 W/m² LS122 (assumption) 1.4 W/m² ISM400_new 22.3 W/m² Solarmeter 10.0 (Global Power) (assumption) 33 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] | 0 | 0 % |
| UVB (US) (280nm -320nm) [µW/cm] | 0 | 0 % |
| Solar UVB (290nm -315nm) [µW/cm] | 0 | 0 % |
| UVA (EU) (315nm -380nm) [µW/cm] | 1.28 | 0.0452 % |
| UVA (US) (320nm -380nm) [µW/cm] | 1.28 | 0.0452 % |
| UVA2 (medical definition) (320nm -340nm) [µW/cm] | 0 | 0 % |
| UVA1 (medical) (340nm -400nm) [µW/cm] | 2.16 | 0.0758 % |
| UVA D3 regulating (315nm -335nm) [µW/cm] | 0 | 0 % |
| vis. UVA (350nm -380nm) [µW/cm] | 1.17 | 0.0411 % |
| VIS (380nm -780nm) [µW/cm] | 2820 | 99.2 % |
| blue (420nm -490nm) [µW/cm] | 481 | 16.9 % |
| total2 (250nm -880nm) [µW/cm] | 2840 | 100 % |
| Erythema [UV-Index] | 0.000291 | |
| Luminosity [lx] | 7980 | |
| Blue Light Hazard [µW/cm²] | 414 | 51.8µW/cm/1000lx |
| Solarmeter 6.5 (UVI, post 2010) [UV-Index] | 4.28E-5 | |
| Solarmeter 6.2 (UVB, post 2010) [µW/cm²] | 0.000427 | |
| Actinic UV [µW/cm²] | 0.000198 | 5.17 at UVI7.6 |
| Vitamin D3 [µW/cm²] | 0 | 0 at UVI7.6 |