http://www.mv.helsinki.fi/aphalo/photobio/pdf/spectra/UVB313.pdf
Spectrum 139: SW-M-QL1 Edit
DeleteMeasurement
| Brand |
Q-Lab Q-Lab Corporation http://www.q-lab.com/ |
|---|---|
| Lamp Product |
UVB-313 40W |
| Lamp ID |
SW-M-QL1 (03/2010) |
| Spectrometer | SR9010-PC |
| Ballast | - no ballast or default/unknown ballast - |
| Reflector | |
| Distance | 0 cm |
| Age | 0 hours |
| Originator (measurement) | Pedro J. Aphalo |
Database entry created:
Sarina Wunderlich
23/Mar/2010 ; updated:
Sarina Wunderlich
4/Sep/2021
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 | ( 0.22 ; 0.2 ) | ( 0.099 ; 0.55 ) | ( 0.11 ; 0.088 ; 0.49 ) |
| CCT | 0 Kelvin | 39000 Kelvin | 0 Kelvin |
| distance | 0.26 | 0 | |
| 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) 1150 µW/cm² = 11.5 W/m² UVC ( 0 nm - 280 nm) 1.99 µW/cm² = 0.0199 W/m² non-terrestrial ( 0 nm - 290 nm) 31.9 µW/cm² = 0.319 W/m² total2 ( 250 nm - 880 nm) 1150 µW/cm² = 11.5 W/m² UVB (EU) ( 280 nm - 315 nm) 408 µW/cm² = 4.08 W/m² UVB (US) ( 280 nm - 320 nm) 495 µW/cm² = 4.95 W/m² UVA+B ( 280 nm - 380 nm) 881 µW/cm² = 8.81 W/m² Solar UVB ( 290 nm - 315 nm) 378 µW/cm² = 3.78 W/m² UVA D3 regulating ( 315 nm - 335 nm) 302 µW/cm² = 3.02 W/m² UVA (EU) ( 315 nm - 380 nm) 473 µW/cm² = 4.73 W/m² UVA2 (medical definition) ( 320 nm - 340 nm) 258 µW/cm² = 2.58 W/m² UVA (US) ( 320 nm - 380 nm) 386 µW/cm² = 3.86 W/m² UVA1 (variant) ( 335 nm - 380 nm) 171 µW/cm² = 1.71 W/m² UVA1 (medical) ( 340 nm - 400 nm) 136 µW/cm² = 1.36 W/m² vis. UVA ( 350 nm - 380 nm) 69.9 µW/cm² = 0.699 W/m² VIS Rep3 ( 350 nm - 600 nm) 316 µW/cm² = 3.16 W/m² VIS Rep4 ( 350 nm - 700 nm) 332 µW/cm² = 3.32 W/m² purple ( 380 nm - 420 nm) 57 µW/cm² = 0.57 W/m² VIS ( 380 nm - 780 nm) 267 µW/cm² = 2.67 W/m² VIS2 ( 400 nm - 680 nm) 251 µW/cm² = 2.51 W/m² PAR ( 400 nm - 700 nm) 254 µW/cm² = 2.54 W/m² tmp ( 400 nm - 1100 nm) 260 µW/cm² = 2.6 W/m² blue ( 420 nm - 490 nm) 119 µW/cm² = 1.19 W/m² green ( 490 nm - 575 nm) 58.6 µW/cm² = 0.586 W/m² yellow ( 575 nm - 585 nm) 9.64 µW/cm² = 0.0964 W/m² orange ( 585 nm - 650 nm) 10.8 µW/cm² = 0.108 W/m² red ( 650 nm - 780 nm) 12.7 µW/cm² = 0.127 W/m² IRA ( 700 nm - 1400 nm) 6.3 µW/cm² = 0.063 W/m² IR2 ( 720 nm - 1100 nm) 5.07 µW/cm² = 0.0507 W/m² IRB ( 1400 nm - 3000 nm) 0 µW/cm² = 0 W/m²
Actionspectra
Erythema 69 UV-Index Pyrimidine dimerization of DNA 240 µW/cm² Photoceratitis 108 µW/cm² Photoconjunctivitis 9.2 µW/cm² DNA Damage 25 Vitamin D3 216 µW/cm² Photosynthesis 190 µW/cm² Luminosity 513 lx Human L-Cone 72.6 µW/cm² Human M-Cone 71.8 µW/cm² Human S-Cone 114 µW/cm² CIE X 78.7 µW/cm² CIE Y 71 µW/cm² CIE Z 200 µW/cm² PAR 1330000 mol photons Extinction preD3 961 e-3*m²/mol Extinction Tachysterol 3540 e-3*m²/mol Exctincition PreD3 544000 m²/mol Extinction Lumisterol 543 m²/mol Exctincition Tachysterol 4590000 m²/mol Extinction 7DHC 694 m²/mol L-Cone 55.1 µW/cm² M-Cone 43.1 µW/cm² S-Cone 238 µW/cm² U-Cone 154 µW/cm² UVR - ICNIRP 2004 85.9 Rel Biol Eff Melatonin Supression 122 µW/cm² Blue Light Hazard 137 µW/cm² (266 µW/cm² per 1000 lx) CIE 174:2006 PreVit D3 230 µW/cm² Lumen Reptil 947 "pseudo-lx" Vitamin D3 Degradation 133 µW/cm² Actinic UV 85 µW/cm² (1660 mW/klm) Exctincition Lumisterol 649000 m²/mol Exctincition 7DHC 818000 m²/mol Exctincition Toxisterols 50000 m²/mol
Broadbandmeters
Solarmeter 6.2 (UVB, pre 2010) 599 µW/cm² Solarmeter 6.5 (UV-Index, pre 2010) 65.5 Leybold UVB 415 µW/cm² Leybold UVA 233 µW/cm² Leybold UVC 0.734 µW/cm² DeltaOhm UVB 601 µW/cm² DeltaOhm UVC 108 µW/cm² Vernier UVB 249 µW/cm² Vernier UVA 421 µW/cm² Gröbel UVA 394 µW/cm² Gröbel UVB 316 µW/cm² Gröbel UVC 1.97 µW/cm² Luxmeter 555 lx Solarmeter 6.4 (D3) 205 IU/min UVX-31 635 µW/cm² IL UVB 0.266 µW/cm² IL UVA 287 µW/cm² Solarmeter 6.5 (UVI, post 2010) 43.4 UV-Index Solarmeter 6.2 (UVB, post 2010) 315 µW/cm² (Solarmeter Ratio = 7.26) Solarmeter AlGaN 6.5 UVI sensor 355 UV Index GenUV 7.1 UV-Index 18.2 UV-Index Solarmeter 10.0 (Global Power) (manuf.) 5.45 W/m² Solarmeter 4.0 (UVA) 3.92 mW/cm² LS122 (manuf.) 1.52E-5 W/m² ISM400 (first guess) 1.41 W/m² LS122 (assumption) 0.0473 W/m² ISM400_new 1.01 W/m² Solarmeter 10.0 (Global Power) (assumption) 3.14 W/m²