sunlight also included
Spectrum 730: TG-Tierpark-Monitor Edit
DeleteMeasurement
| Brand |
Enclosure Setup |
|---|---|
| Lamp Product |
Enclosure |
| Lamp ID |
TG-Tierpark-Monitor (06/2023) Momnitor Lizard Enclosure |
| Spectrometer | FLAME UV-Vis (E) |
| Ballast | - no ballast or default/unknown ballast - |
| Reflector | |
| Distance | 100 cm |
| Age | 100 hours |
| Originator (measurement) | Thomas Griffiths |
Database entry created:
Thomas Griffiths (Tomaskas Ltd.)
19/Sep/2023 ; updated:
Thomas Griffiths (Tomaskas Ltd.)
19/Sep/2023
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 | ( 0.32 ; 0.32 ) | ( 0.31 ; 0.4 ) | ( 0.25 ; 0.23 ; 0.3 ) |
| CCT | 6000 Kelvin | 7200 Kelvin | 6200 Kelvin |
| distance | 0.058 | 0.049 | |
| 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) 17700 µW/cm² = 177 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) 17600 µW/cm² = 176 W/m² UVB (EU) ( 280 nm - 315 nm) 82.6 µW/cm² = 0.826 W/m² UVB (US) ( 280 nm - 320 nm) 95.5 µW/cm² = 0.955 W/m² UVA+B ( 280 nm - 380 nm) 1440 µW/cm² = 14.4 W/m² Solar UVB ( 290 nm - 315 nm) 82.6 µW/cm² = 0.826 W/m² UVA D3 regulating ( 315 nm - 335 nm) 185 µW/cm² = 1.85 W/m² UVA (EU) ( 315 nm - 380 nm) 1360 µW/cm² = 13.6 W/m² UVA2 (medical definition) ( 320 nm - 340 nm) 236 µW/cm² = 2.36 W/m² UVA (US) ( 320 nm - 380 nm) 1350 µW/cm² = 13.5 W/m² UVA1 (variant) ( 335 nm - 380 nm) 1180 µW/cm² = 11.8 W/m² UVA1 (medical) ( 340 nm - 400 nm) 1860 µW/cm² = 18.6 W/m² vis. UVA ( 350 nm - 380 nm) 974 µW/cm² = 9.74 W/m² VIS Rep3 ( 350 nm - 600 nm) 12700 µW/cm² = 127 W/m² VIS Rep4 ( 350 nm - 700 nm) 14700 µW/cm² = 147 W/m² purple ( 380 nm - 420 nm) 2230 µW/cm² = 22.3 W/m² VIS ( 380 nm - 780 nm) 14500 µW/cm² = 145 W/m² PAR ( 400 nm - 700 nm) 13000 µW/cm² = 130 W/m² blue ( 420 nm - 490 nm) 3620 µW/cm² = 36.2 W/m² green ( 490 nm - 575 nm) 3890 µW/cm² = 38.9 W/m² yellow ( 575 nm - 585 nm) 212 µW/cm² = 2.12 W/m² orange ( 585 nm - 650 nm) 3140 µW/cm² = 31.4 W/m² red ( 650 nm - 780 nm) 1420 µW/cm² = 14.2 W/m² IRA ( 700 nm - 1400 nm) 2520 µW/cm² = 25.2 W/m² IRB ( 1400 nm - 3000 nm) 0 µW/cm² = 0 W/m²
Actionspectra
Erythema 10 UV-Index Pyrimidine dimerization of DNA 55.3 µW/cm² Photoceratitis 14.8 µW/cm² Photoconjunctivitis 0.574 µW/cm² DNA Damage 1.98 Vitamin D3 36.5 µW/cm² Photosynthesis 8960 µW/cm² Luminosity 38000 lx Human L-Cone 5700 µW/cm² Human M-Cone 4700 µW/cm² Human S-Cone 3260 µW/cm² CIE X 5330 µW/cm² CIE Y 5260 µW/cm² CIE Z 5940 µW/cm² PAR 60400000 mol photons Extinction preD3 165 e-3*m²/mol Extinction Tachysterol 592 e-3*m²/mol Exctincition PreD3 88400 m²/mol Extinction Lumisterol 59.9 m²/mol Exctincition Tachysterol 876000 m²/mol Extinction 7DHC 72 m²/mol L-Cone 4810 µW/cm² M-Cone 4450 µW/cm² S-Cone 5740 µW/cm² U-Cone 4220 µW/cm² UVR - ICNIRP 2004 10.4 Rel Biol Eff Melatonin Supression 4670 µW/cm² Blue Light Hazard 3800 µW/cm² (100 µW/cm² per 1000 lx) CIE 174:2006 PreVit D3 40.6 µW/cm² Lumen Reptil 43100 "pseudo-lx" Vitamin D3 Degradation 25.8 µW/cm² Actinic UV 10.3 µW/cm² (2.7 mW/klm) Exctincition Lumisterol 74900 m²/mol Exctincition 7DHC 85600 m²/mol Exctincition Toxisterols 13000 m²/mol
Broadbandmeters
Solarmeter 6.2 (UVB, pre 2010) 135 µW/cm² Solarmeter 6.5 (UV-Index, pre 2010) 10.8 Leybold UVB 96.1 µW/cm² Leybold UVA 1020 µW/cm² Leybold UVC 0.05 µW/cm² DeltaOhm UVB 242 µW/cm² DeltaOhm UVC 29.8 µW/cm² Vernier UVB 50.3 µW/cm² Vernier UVA 660 µW/cm² Gröbel UVA 1100 µW/cm² Gröbel UVB 62.3 µW/cm² Gröbel UVC 0.00678 µW/cm² Solarmeter 6.4 (D3) 33.6 IU/min UVX-31 306 µW/cm² IL UVB 0.0685 µW/cm² IL UVA 1200 µW/cm² Solarmeter 6.5 (UVI, post 2010) 7.88 UV-Index Solarmeter 6.2 (UVB, post 2010) 84.1 µW/cm² (Solarmeter Ratio = 10.7) Solarmeter AlGaN 6.5 UVI sensor 72.3 UV Index GenUV 7.1 UV-Index 3.86 UV-Index Solarmeter 10.0 (Global Power) 180 W/m² Solarmeter 4.0 (UVA) 21.3 mW/cm² LS122 1.93 W/m² ISM400 138 W/m²