CCT:1019 5282K
CRI DC:1017 0
CRI R01:1002 93,4 (5282K)
CRI R02:1003 93,0 (5282K)
CRI R03:1004 94,0 (5282K)
CRI R04:1005 93,3 (5282K)
CRI R05:1006 93,1 (5282K)
CRI R06:1007 90,7 (5282K)
CRI R07:1008 93,1 (5282K)
CRI R08:1009 93,5 (5282K)
CRI R09:1010 83,5 (5282K)
CRI R10:1011 84,8 (5282K)
CRI R11:1012 94,3 (5282K)
CRI R12:1013 86,4 (5282K)
CRI R13:1014 92,7 (5282K)
CRI R14:1015 97,0 (5282K)
CRI R15:1016 92,3 (5282K)
CRI Ra:1001 93,0 (5282K)
DC<5.4E-3:1018 true
Spectrum 828: SW103 Edit
DeleteMeasurement
| Brand |
Fauna Lux |
|---|---|
| Lamp Product |
True Chroma 20W |
| Lamp ID |
SW103 (05/2025) |
| Spectrometer | USB 2000 |
| Ballast | - no ballast or default/unknown ballast - |
| Reflector | |
| Distance | 20 cm |
| Age | 10 hours |
| Originator (measurement) | Sarina Wunderlich |
Database entry created:
Sarina Wunderlich
27/Jun/2025 ; updated:
Sarina Wunderlich
27/Jun/2025
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 (id 1).
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 ) | ( 0.48 ; 0.35 ) | ( 0.31 ; 0.33 ; 0.24 ) |
| CCT | 5300 Kelvin | 3800 Kelvin | 4600 Kelvin |
| distance | 0.021 | 0.051 | |
| colour space | 3-D-graph not implemented yet |
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 two solarmeters 6.2 (UVB) and 6.5 (UV index) readings has proven a useful and very simply number to acess the spectral shape in the vitamin-d3-active region.
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
Ranges
total ( 0 nm - 0 nm) 5240 µW/cm² = 52.4 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) 5240 µW/cm² = 52.4 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) 140 µW/cm² = 1.4 W/m² Solar UVB ( 290 nm - 315 nm) 0 µW/cm² = 0 W/m² UVA D3 regulating ( 315 nm - 335 nm) 1 µW/cm² = 0.01 W/m² UVA (EU) ( 315 nm - 380 nm) 140 µW/cm² = 1.4 W/m² UVA2 (medical definition) ( 320 nm - 340 nm) 1.52 µW/cm² = 0.0152 W/m² UVA (US) ( 320 nm - 380 nm) 140 µW/cm² = 1.4 W/m² UVA1 (variant) ( 335 nm - 380 nm) 139 µW/cm² = 1.39 W/m² UVA1 (medical) ( 340 nm - 400 nm) 239 µW/cm² = 2.39 W/m² vis. UVA ( 350 nm - 380 nm) 137 µW/cm² = 1.37 W/m² VIS Rep3 ( 350 nm - 600 nm) 3430 µW/cm² = 34.3 W/m² VIS Rep4 ( 350 nm - 700 nm) 4950 µW/cm² = 49.5 W/m² purple ( 380 nm - 420 nm) 286 µW/cm² = 2.86 W/m² VIS ( 380 nm - 780 nm) 5060 µW/cm² = 50.6 W/m² VIS2 ( 400 nm - 680 nm) 4520 µW/cm² = 45.2 W/m² PAR ( 400 nm - 700 nm) 4710 µW/cm² = 47.1 W/m² tmp ( 400 nm - 1100 nm) 5000 µW/cm² = 50 W/m² blue ( 420 nm - 490 nm) 1130 µW/cm² = 11.3 W/m² green ( 490 nm - 575 nm) 1460 µW/cm² = 14.6 W/m² yellow ( 575 nm - 585 nm) 167 µW/cm² = 1.67 W/m² orange ( 585 nm - 650 nm) 1140 µW/cm² = 11.4 W/m² red ( 650 nm - 780 nm) 875 µW/cm² = 8.75 W/m² IRA ( 700 nm - 1400 nm) 287 µW/cm² = 2.87 W/m² IR2 ( 720 nm - 1100 nm) 167 µW/cm² = 1.67 W/m² IRB ( 1400 nm - 3000 nm) 0 µW/cm² = 0 W/m²
Actionspectra
Erythema 0.027 UV-Index Pyrimidine dimerization of DNA 0.0154 µW/cm² Photoceratitis 0 µW/cm² Photoconjunctivitis 0 µW/cm² DNA Damage 8.5E-5 Vitamin D3 0 µW/cm² Photosynthesis 3280 µW/cm² Luminosity 13200 lx Human L-Cone 1990 µW/cm² Human M-Cone 1630 µW/cm² Human S-Cone 867 µW/cm² CIE X 1780 µW/cm² CIE Y 1830 µW/cm² CIE Z 1660 µW/cm² PAR PPFD 222 µmol/m²/s Extinction preD3 0.0426 e-3*m²/mol Extinction Tachysterol 0.18 e-3*m²/mol Exctincition PreD3 76.2 m²/mol Extinction Lumisterol 0 m²/mol Exctincition Tachysterol 1150 m²/mol Extinction 7DHC 0 m²/mol L-Cone 1710 µW/cm² M-Cone 1830 µW/cm² S-Cone 1310 µW/cm² U-Cone 635 µW/cm² UVR - ICNIRP 2004 0.018 Rel Biol Eff Melatonin Supression 1410 µW/cm² Blue Light Hazard 974 µW/cm² (73.5 µW/cm² per 1000 lx) CIE 174:2006 PreVit D3 0 µW/cm² Lumen Reptil 13100 "pseudo-lx" Vitamin D3 Degradation 0.0168 µW/cm² Actinic UV 0.018 µW/cm² (0.0136 mW/klm) Exctincition Lumisterol 1.09 m²/mol Exctincition 7DHC 0.0746 m²/mol Exctincition Toxisterols 37.3 m²/mol
Broadbandmeters
Solarmeter 6.2 (UVB, pre 2010) 0.971 µW/cm² Solarmeter 6.5 (UV-Index, pre 2010) 0.0128 Leybold UVB 0.0533 µW/cm² Leybold UVA 92.5 µW/cm² Leybold UVC 0 µW/cm² DeltaOhm UVB 0.938 µW/cm² DeltaOhm UVC 0.0486 µW/cm² Vernier UVB 0 µW/cm² Vernier UVA 39.5 µW/cm² Gröbel UVA 101 µW/cm² Gröbel UVB 0.0228 µW/cm² Gröbel UVC 0 µW/cm² Luxmeter 13300 lx Solarmeter 6.4 (D3) 0.0399 IU/min UVX-31 3.3 µW/cm² IL UVB 0.000482 µW/cm² IL UVA 128 µW/cm² Solarmeter 6.5 (UVI, post 2010) 0.00417 UV-Index Solarmeter 6.2 (UVB, post 2010) 0.136 µW/cm² (Solarmeter Ratio = 32.6) Solarmeter AlGaN 6.5 UVI sensor 0.0361 UV Index GenUV 7.1 UV-Index 0.0397 UV-Index Solarmeter 10.0 (Global Power) (manuf.) 56.2 W/m² Solarmeter 4.0 (UVA) 2.48 mW/cm² LS122 (manuf.) 0.0434 W/m² ISM400 (first guess) 41.5 W/m² LS122 (assumption) 2.08 W/m² ISM400_new 34.7 W/m² Solarmeter 10.0 (Global Power) (assumption) 54.7 W/m²