Spectrum #848 SW104 (Fauna Lux True Chroma 30W) Edit
Delete(1) Raw Measurement
| Lampid | SW104 |
|---|---|
| Spectrometer | USB2000+ |
| Originator | Sarina Wunderlich |
| Ballast | - no ballast or default/unknown ballast - |
| Reflector | - no reflector - |
| Distance | 15 |
| Age | 2,700 |
created by Sarina Wunderlich, 24.03.2026; last updated by , 24.03.2026
Description
(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 | ( 0.34 ; 0.35 ) | ( 0.5 ; 0.36 ) | ( 0.32 ; 0.33 ; 0.25 ) |
| CCT | 5200 Kelvin | 3800 Kelvin | 4400 Kelvin |
| distance | 0.039 | 0.053 | |
| 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) 13200 µW/cm² = 132 W/m² UVC ( 0 nm - 280 nm) -1.33 µW/cm² = -0.0133 W/m² non-terrestrial ( 0 nm - 290 nm) -1.33 µW/cm² = -0.0133 W/m² total2 ( 250 nm - 880 nm) 13200 µW/cm² = 132 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) 200 µW/cm² = 2 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) 200 µW/cm² = 2 W/m² UVA2 (medical definition) ( 320 nm - 340 nm) 0 µW/cm² = 0 W/m² UVA (US) ( 320 nm - 380 nm) 200 µW/cm² = 2 W/m² UVA1 (variant) ( 335 nm - 380 nm) 200 µW/cm² = 2 W/m² UVA1 (medical) ( 340 nm - 400 nm) 435 µW/cm² = 4.35 W/m² vis. UVA ( 350 nm - 380 nm) 200 µW/cm² = 2 W/m² VIS Rep3 ( 350 nm - 600 nm) 8770 µW/cm² = 87.7 W/m² VIS Rep4 ( 350 nm - 700 nm) 12600 µW/cm² = 126 W/m² purple ( 380 nm - 420 nm) 721 µW/cm² = 7.21 W/m² VIS ( 380 nm - 780 nm) 13000 µW/cm² = 130 W/m² VIS2 ( 400 nm - 680 nm) 11700 µW/cm² = 117 W/m² PAR ( 400 nm - 700 nm) 12200 µW/cm² = 122 W/m² tmp ( 400 nm - 1100 nm) 12800 µW/cm² = 128 W/m² blue ( 420 nm - 490 nm) 2900 µW/cm² = 29 W/m² green ( 490 nm - 575 nm) 3830 µW/cm² = 38.3 W/m² yellow ( 575 nm - 585 nm) 447 µW/cm² = 4.47 W/m² orange ( 585 nm - 650 nm) 2990 µW/cm² = 29.9 W/m² red ( 650 nm - 780 nm) 2090 µW/cm² = 20.9 W/m² IR2 ( 655 nm - 685 nm) 985 µW/cm² = 9.85 W/m² IRA ( 700 nm - 1400 nm) 596 µW/cm² = 5.96 W/m² IRB ( 1400 nm - 3000 nm) 0 µW/cm² = 0 W/m²
(5b) Actionspectra
Erythema -0.359 UV-Index Pyrimidine dimerization of DNA 0.000725 µW/cm² Photoceratitis -0.36 µW/cm² Photoconjunctivitis -0.47 µW/cm² DNA Damage -0.705 Vitamin D3 -0.44 µW/cm² Photosynthesis 8410 µW/cm² Luminosity 35000 lx Human L-Cone 5260 µW/cm² Human M-Cone 4310 µW/cm² Human S-Cone 2250 µW/cm² CIE X 4710 µW/cm² CIE Y 4850 µW/cm² CIE Z 4300 µW/cm² PAR PPFD 571 µmol/m²/s Extinction preD3 -6.95 e-3*m²/mol Extinction Tachysterol -21.8 e-3*m²/mol Exctincition PreD3 -6370 m²/mol Extinction Lumisterol -7.67 m²/mol Exctincition Tachysterol -27700 m²/mol Extinction 7DHC -10 m²/mol L-Cone 4510 µW/cm² M-Cone 4650 µW/cm² S-Cone 3420 µW/cm² U-Cone 1330 µW/cm² UVR - ICNIRP 2004 -0.915 Rel Biol Eff Melatonin Supression 3610 µW/cm² Blue Light Hazard 2520 µW/cm² (72.1 µW/cm² per 1000 lx) CIE 174:2006 PreVit D3 -0.408 µW/cm² Lumen Reptil 33700 "pseudo-lx" Vitamin D3 Degradation -0.749 µW/cm² Actinic UV -0.909 µW/cm² (-0.26 mW/klm) Exctincition Lumisterol -8640 m²/mol Exctincition 7DHC -10000 m²/mol Exctincition Toxisterols -524 m²/mol
(5c) Broadbandmeters
Solarmeter 6.2 (UVB, pre 2010) 0.063 µW/cm² Solarmeter 6.5 (UV-Index, pre 2010) -0.294 Leybold UVB -0.0172 µW/cm² Leybold UVA 135 µW/cm² Leybold UVC -0.177 µW/cm² DeltaOhm UVB -0.17 µW/cm² DeltaOhm UVC -0.488 µW/cm² Vernier UVB -0.177 µW/cm² Vernier UVA 60.8 µW/cm² Gröbel UVA 141 µW/cm² Gröbel UVB -0.607 µW/cm² Gröbel UVC -0.357 µW/cm² Luxmeter 35300 lx Solarmeter 6.4 (D3) -0.92 IU/min UVX-31 1.96 µW/cm² IL UVB -8.94E-5 µW/cm² IL UVA 187 µW/cm² Solarmeter 6.5 (UVI, post 2010) -0.133 UV-Index Solarmeter 6.2 (UVB, post 2010) -0.382 µW/cm² (Solarmeter Ratio = 2.88) Solarmeter AlGaN 6.5 UVI sensor -0.603 UV Index GenUV 7.1 UV-Index 0.0258 UV-Index Solarmeter 10.0 (Global Power) (manuf.) 142 W/m² Solarmeter 4.0 (UVA) 4.3 mW/cm² LS122 (manuf.) 0.000659 W/m² ISM400 (first guess) 104 W/m² LS122 (assumption) 5.21 W/m² ISM400_new 85.8 W/m² Solarmeter 10.0 (Global Power) (assumption) 138 W/m²
(5d) Summary of my favourites
| UVC (0nm -280nm) [µW/cm] | -1.33 | -0.0101 % |
| non-terrestrial (0nm -290nm) [µW/cm] | -1.33 | -0.0101 % |
| 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] | 200 | 1.52 % |
| UVA (US) (320nm -380nm) [µW/cm] | 200 | 1.52 % |
| UVA2 (medical definition) (320nm -340nm) [µW/cm] | 0 | 0 % |
| UVA1 (medical) (340nm -400nm) [µW/cm] | 435 | 3.3 % |
| UVA D3 regulating (315nm -335nm) [µW/cm] | 0 | 0 % |
| vis. UVA (350nm -380nm) [µW/cm] | 200 | 1.52 % |
| VIS (380nm -780nm) [µW/cm] | 13000 | 98.3 % |
| blue (420nm -490nm) [µW/cm] | 2900 | 22 % |
| total2 (250nm -880nm) [µW/cm] | 13200 | 100 % |
| Erythema [UV-Index] | -0.359 | |
| Luminosity [lx] | 35000 | |
| Blue Light Hazard [µW/cm²] | 2520 | 72.1µW/cm/1000lx |
| Solarmeter 6.5 (UVI, post 2010) [UV-Index] | -0.133 | |
| Solarmeter 6.2 (UVB, post 2010) [µW/cm²] | -0.382 | |
| Actinic UV [µW/cm²] | -0.909 | at UVI7.6 |
| Vitamin D3 [µW/cm²] | -0.44 | at UVI7.6 |