Solarmeter readings
6.5 UVI = 15.3
6.2 UVB = 193
Spectrum 344: BZC23 Edit
DeleteMeasurement
| Brand |
Zoo Med Zoo Med Laboratories, Inc http://www.zoomed.com/ |
|---|---|
| Lamp Product |
ReptiSun 5.0 Compact Fluorescent 26W |
| Lamp ID |
BZC23 (10/2010) Used in D.G.A.B. OONINCX, Y. STEVENS, J.J.G.C. VAN DEN BORNE, J.P.T.M. VAN LEEUWEN & W.H. HENDRIKS. 2010. Effects of vitamin D3 supplementation and UVb exposure on the growth and plasma concentration of vitamin D3 metabolites in juvenile bearded dragons (Pogona vitticeps). Comparative Biochemistry and Physiology Part B: Biochemistry and Molecular Biology 156.2. 122–128. |
| Spectrometer | USB2000+ (2) |
| Ballast | - no ballast or default/unknown ballast - |
| Reflector | |
| Distance | 5 cm |
| Age | 0 hours |
| Originator (measurement) | Frances Baines |
Database entry created:
Sarina Wunderlich
14/Dec/2010 ; updated:
Sarina Wunderlich
25/Oct/2016
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 | ( 0.26 ; 0.26 ) | ( 0.27 ; 0.53 ) | ( 0.19 ; 0.22 ; 0.42 ) |
| CCT | 16000 Kelvin | 7900 Kelvin | 8400 Kelvin |
| distance | 0.19 | 0.15 | |
| 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) 1910 µW/cm² = 19.1 W/m² UVC ( 0 nm - 280 nm) 0.711 µW/cm² = 0.00711 W/m² non-terrestrial ( 0 nm - 290 nm) 2.23 µW/cm² = 0.0223 W/m² total2 ( 250 nm - 880 nm) 1910 µW/cm² = 19.1 W/m² UVB (EU) ( 280 nm - 315 nm) 115 µW/cm² = 1.15 W/m² UVB (US) ( 280 nm - 320 nm) 143 µW/cm² = 1.43 W/m² UVA+B ( 280 nm - 380 nm) 303 µW/cm² = 3.03 W/m² Solar UVB ( 290 nm - 315 nm) 114 µW/cm² = 1.14 W/m² UVA D3 regulating ( 315 nm - 335 nm) 86.6 µW/cm² = 0.866 W/m² UVA (EU) ( 315 nm - 380 nm) 188 µW/cm² = 1.88 W/m² UVA2 (medical definition) ( 320 nm - 340 nm) 70.9 µW/cm² = 0.709 W/m² UVA (US) ( 320 nm - 380 nm) 161 µW/cm² = 1.61 W/m² UVA1 (variant) ( 335 nm - 380 nm) 102 µW/cm² = 1.02 W/m² UVA1 (medical) ( 340 nm - 400 nm) 121 µW/cm² = 1.21 W/m² vis. UVA ( 350 nm - 380 nm) 75.7 µW/cm² = 0.757 W/m² VIS Rep3 ( 350 nm - 600 nm) 1350 µW/cm² = 13.5 W/m² VIS Rep4 ( 350 nm - 700 nm) 1570 µW/cm² = 15.7 W/m² purple ( 380 nm - 420 nm) 172 µW/cm² = 1.72 W/m² VIS ( 380 nm - 780 nm) 1560 µW/cm² = 15.6 W/m² VIS2 ( 400 nm - 680 nm) 1430 µW/cm² = 14.3 W/m² PAR ( 400 nm - 700 nm) 1460 µW/cm² = 14.6 W/m² tmp ( 400 nm - 1100 nm) 1570 µW/cm² = 15.7 W/m² blue ( 420 nm - 490 nm) 564 µW/cm² = 5.64 W/m² green ( 490 nm - 575 nm) 413 µW/cm² = 4.13 W/m² yellow ( 575 nm - 585 nm) 78.9 µW/cm² = 0.789 W/m² orange ( 585 nm - 650 nm) 173 µW/cm² = 1.73 W/m² red ( 650 nm - 780 nm) 163 µW/cm² = 1.63 W/m² IRA ( 700 nm - 1400 nm) 111 µW/cm² = 1.11 W/m² IR2 ( 720 nm - 1100 nm) 88.8 µW/cm² = 0.888 W/m² IRB ( 1400 nm - 3000 nm) 0 µW/cm² = 0 W/m²
Actionspectra
Erythema 12.2 UV-Index Pyrimidine dimerization of DNA 66.8 µW/cm² Photoceratitis 18.4 µW/cm² Photoconjunctivitis 1.31 µW/cm² DNA Damage 3.04 Vitamin D3 44.7 µW/cm² Photosynthesis 1060 µW/cm² Luminosity 3630 lx Human L-Cone 527 µW/cm² Human M-Cone 483 µW/cm² Human S-Cone 497 µW/cm² CIE X 503 µW/cm² CIE Y 502 µW/cm² CIE Z 901 µW/cm² PAR 6970000 mol photons Extinction preD3 211 e-3*m²/mol Extinction Tachysterol 740 e-3*m²/mol Exctincition PreD3 106000 m²/mol Extinction Lumisterol 77.2 m²/mol Exctincition Tachysterol 957000 m²/mol Extinction 7DHC 90 m²/mol L-Cone 424 µW/cm² M-Cone 478 µW/cm² S-Cone 923 µW/cm² U-Cone 350 µW/cm² UVR - ICNIRP 2004 13.1 Rel Biol Eff Melatonin Supression 615 µW/cm² Blue Light Hazard 558 µW/cm² (154 µW/cm² per 1000 lx) CIE 174:2006 PreVit D3 48.5 µW/cm² Lumen Reptil 4700 "pseudo-lx" Vitamin D3 Degradation 31.6 µW/cm² Actinic UV 12.9 µW/cm² (35.6 mW/klm) Exctincition Lumisterol 95600 m²/mol Exctincition 7DHC 109000 m²/mol Exctincition Toxisterols 12800 m²/mol
Broadbandmeters
Solarmeter 6.2 (UVB, pre 2010) 162 µW/cm² Solarmeter 6.5 (UV-Index, pre 2010) 12.9 Leybold UVB 122 µW/cm² Leybold UVA 102 µW/cm² Leybold UVC 0.482 µW/cm² DeltaOhm UVB 176 µW/cm² DeltaOhm UVC 28.6 µW/cm² Vernier UVB 62.1 µW/cm² Vernier UVA 140 µW/cm² Gröbel UVA 160 µW/cm² Gröbel UVB 78 µW/cm² Gröbel UVC 0.526 µW/cm² Luxmeter 3820 lx Solarmeter 6.4 (D3) 40.2 IU/min UVX-31 189 µW/cm² IL UVB 0.0676 µW/cm² IL UVA 134 µW/cm² Solarmeter 6.5 (UVI, post 2010) 9.43 UV-Index Solarmeter 6.2 (UVB, post 2010) 91.2 µW/cm² (Solarmeter Ratio = 9.67) Solarmeter AlGaN 6.5 UVI sensor 95.5 UV Index GenUV 7.1 UV-Index 4.9 UV-Index Solarmeter 10.0 (Global Power) (manuf.) 16.7 W/m² Solarmeter 4.0 (UVA) 2.13 mW/cm² LS122 (manuf.) 0.0253 W/m² ISM400 (first guess) 10.6 W/m² LS122 (assumption) 0.471 W/m² ISM400_new 8.76 W/m² Solarmeter 10.0 (Global Power) (assumption) 15 W/m²