CCT:1019 5257K
CRI DC:1017 0
CRI R01:1002 94,5 (5257K)
CRI R02:1003 94,3 (5257K)
CRI R03:1004 95,7 (5257K)
CRI R04:1005 95,0 (5257K)
CRI R05:1006 94,2 (5257K)
CRI R06:1007 92,1 (5257K)
CRI R07:1008 94,0 (5257K)
CRI R08:1009 94,7 (5257K)
CRI R09:1010 87,9 (5257K)
CRI R10:1011 88,1 (5257K)
CRI R11:1012 95,5 (5257K)
CRI R12:1013 88,5 (5257K)
CRI R13:1014 94,0 (5257K)
CRI R14:1015 98,0 (5257K)
CRI R15:1016 93,8 (5257K)
CRI Ra:1001 94,3 (5257K)
DC<5.4E-3:1018 true
Spectrum 829: SW105 Edit
DeleteMeasurement
| Brand |
Fauna Lux |
|---|---|
| Lamp Product |
True Chroma 35W |
| Lamp ID |
SW105 (05/2025) |
| Spectrometer | USB2000+ |
| Ballast | - no ballast or default/unknown ballast - |
| Reflector | |
| Distance | 30 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 ) | ( 0.47 ; 0.36 ) | ( 0.31 ; 0.32 ; 0.24 ) |
| CCT | 5200 Kelvin | 4000 Kelvin | 4600 Kelvin |
| distance | 0.026 | 0.044 | |
| 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) 6530 µW/cm² = 65.3 W/m² UVC ( 0 nm - 280 nm) 0.508 µW/cm² = 0.00508 W/m² non-terrestrial ( 0 nm - 290 nm) 1.39 µW/cm² = 0.0139 W/m² total2 ( 250 nm - 880 nm) 6530 µW/cm² = 65.3 W/m² UVB (EU) ( 280 nm - 315 nm) 4.17 µW/cm² = 0.0417 W/m² UVB (US) ( 280 nm - 320 nm) 4.9 µW/cm² = 0.049 W/m² UVA+B ( 280 nm - 380 nm) 177 µW/cm² = 1.77 W/m² Solar UVB ( 290 nm - 315 nm) 3.29 µW/cm² = 0.0329 W/m² UVA D3 regulating ( 315 nm - 335 nm) 2.72 µW/cm² = 0.0272 W/m² UVA (EU) ( 315 nm - 380 nm) 173 µW/cm² = 1.73 W/m² UVA2 (medical definition) ( 320 nm - 340 nm) 2.6 µW/cm² = 0.026 W/m² UVA (US) ( 320 nm - 380 nm) 172 µW/cm² = 1.72 W/m² UVA1 (variant) ( 335 nm - 380 nm) 170 µW/cm² = 1.7 W/m² UVA1 (medical) ( 340 nm - 400 nm) 295 µW/cm² = 2.95 W/m² vis. UVA ( 350 nm - 380 nm) 168 µW/cm² = 1.68 W/m² VIS Rep3 ( 350 nm - 600 nm) 4280 µW/cm² = 42.8 W/m² VIS Rep4 ( 350 nm - 700 nm) 6160 µW/cm² = 61.6 W/m² purple ( 380 nm - 420 nm) 387 µW/cm² = 3.87 W/m² VIS ( 380 nm - 780 nm) 6310 µW/cm² = 63.1 W/m² VIS2 ( 400 nm - 680 nm) 5630 µW/cm² = 56.3 W/m² PAR ( 400 nm - 700 nm) 5870 µW/cm² = 58.7 W/m² tmp ( 400 nm - 1100 nm) 6230 µW/cm² = 62.3 W/m² blue ( 420 nm - 490 nm) 1380 µW/cm² = 13.8 W/m² green ( 490 nm - 575 nm) 1820 µW/cm² = 18.2 W/m² yellow ( 575 nm - 585 nm) 211 µW/cm² = 2.11 W/m² orange ( 585 nm - 650 nm) 1420 µW/cm² = 14.2 W/m² red ( 650 nm - 780 nm) 1090 µW/cm² = 10.9 W/m² IRA ( 700 nm - 1400 nm) 356 µW/cm² = 3.56 W/m² IR2 ( 720 nm - 1100 nm) 207 µW/cm² = 2.07 W/m² IRB ( 1400 nm - 3000 nm) 0 µW/cm² = 0 W/m²
Actionspectra
Erythema 1.2 UV-Index Pyrimidine dimerization of DNA 2.16 µW/cm² Photoceratitis 1.75 µW/cm² Photoconjunctivitis 0.5 µW/cm² DNA Damage 0.92 Vitamin D3 2.78 µW/cm² Photosynthesis 4080 µW/cm² Luminosity 16500 lx Human L-Cone 2480 µW/cm² Human M-Cone 2040 µW/cm² Human S-Cone 1090 µW/cm² CIE X 2230 µW/cm² CIE Y 2290 µW/cm² CIE Z 2070 µW/cm² PAR PPFD 277 µmol/m²/s Extinction preD3 16.2 e-3*m²/mol Extinction Tachysterol 57.7 e-3*m²/mol Exctincition PreD3 11600 m²/mol Extinction Lumisterol 13.6 m²/mol Exctincition Tachysterol 74500 m²/mol Extinction 7DHC 17.7 m²/mol L-Cone 2130 µW/cm² M-Cone 2220 µW/cm² S-Cone 1670 µW/cm² U-Cone 810 µW/cm² UVR - ICNIRP 2004 1.89 Rel Biol Eff Melatonin Supression 1740 µW/cm² Blue Light Hazard 1220 µW/cm² (73.9 µW/cm² per 1000 lx) CIE 174:2006 PreVit D3 2.87 µW/cm² Lumen Reptil 16300 "pseudo-lx" Vitamin D3 Degradation 1.99 µW/cm² Actinic UV 1.87 µW/cm² (1.13 mW/klm) Exctincition Lumisterol 15800 m²/mol Exctincition 7DHC 20000 m²/mol Exctincition Toxisterols 974 m²/mol
Broadbandmeters
Solarmeter 6.2 (UVB, pre 2010) 8.07 µW/cm² Solarmeter 6.5 (UV-Index, pre 2010) 1.02 Leybold UVB 3.68 µW/cm² Leybold UVA 114 µW/cm² Leybold UVC 0.149 µW/cm² DeltaOhm UVB 5.72 µW/cm² DeltaOhm UVC 1.41 µW/cm² Vernier UVB 2.53 µW/cm² Vernier UVA 50.2 µW/cm² Gröbel UVA 126 µW/cm² Gröbel UVB 3.71 µW/cm² Gröbel UVC 0.286 µW/cm² Luxmeter 16600 lx Solarmeter 6.4 (D3) 3.18 IU/min UVX-31 8.81 µW/cm² IL UVB 0.00362 µW/cm² IL UVA 158 µW/cm² Solarmeter 6.5 (UVI, post 2010) 0.583 UV-Index Solarmeter 6.2 (UVB, post 2010) 3.21 µW/cm² (Solarmeter Ratio = 5.5) Solarmeter AlGaN 6.5 UVI sensor 3.97 UV Index GenUV 7.1 UV-Index 0.259 UV-Index Solarmeter 10.0 (Global Power) (manuf.) 69.9 W/m² Solarmeter 4.0 (UVA) 3.08 mW/cm² LS122 (manuf.) 0.0461 W/m² ISM400 (first guess) 51.6 W/m² LS122 (assumption) 2.59 W/m² ISM400_new 43.1 W/m² Solarmeter 10.0 (Global Power) (assumption) 67.9 W/m²