Date: Sun Mar 17 17:58:23 GMT 2019
User: lilacdragon
Dark Spectrum Present: Yes
Reference Spectrum Present: No
Number of Sampled Component Spectra: 1
Spectrometers: USB2+F02224
Integration Time (usec): 300000 (USB2+F02224)
Spectra Averaged: 100 (USB2+F02224)
Boxcar Smoothing: 0 (USB2+F02224)
Correct for Electrical Dark: Yes (USB2+F02224)
Strobe/Lamp Enabled: No (USB2+F02224)
Correct for Detector Non-linearity: No (USB2+F02224)
Correct for Stray Light: No (USB2+F02224)
Number of Pixels in Processed Spectrum: 2048
Spectrum 687: FB-BZC26 Edit
DeleteMeasurement
| Brand |
Zoo Med Zoo Med Laboratories, Inc http://www.zoomed.com/ |
|---|---|
| Lamp Product |
ReptiSun 5.0 Tropical compact 26W |
| Lamp ID |
FB-BZC26 (03/2019) From Frances Baines |
| Spectrometer | USB2000+ |
| Ballast | - no ballast or default/unknown ballast - |
| Reflector | |
| Distance | 30 cm |
| Age | 100 hours |
| Originator (measurement) | Frances Baines |
Database entry created:
Thomas Griffiths (Tomaskas Ltd.)
29/Mar/2023 ; updated:
Thomas Griffiths (Tomaskas Ltd.)
29/Mar/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 | ( 0.29 ; 0.3 ) | ( 0.41 ; 0.46 ) | ( 0.26 ; 0.3 ; 0.34 ) |
| CCT | 8100 Kelvin | 5000 Kelvin | 5500 Kelvin |
| distance | 0.12 | 0.098 | |
| 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) 1170 µW/cm² = 11.7 W/m² UVC ( 0 nm - 280 nm) 0 µW/cm² = 0 W/m² non-terrestrial ( 0 nm - 290 nm) 0.186 µW/cm² = 0.00186 W/m² total2 ( 250 nm - 880 nm) 1170 µW/cm² = 11.7 W/m² UVB (EU) ( 280 nm - 315 nm) 33.8 µW/cm² = 0.338 W/m² UVB (US) ( 280 nm - 320 nm) 45.9 µW/cm² = 0.459 W/m² UVA+B ( 280 nm - 380 nm) 158 µW/cm² = 1.58 W/m² Solar UVB ( 290 nm - 315 nm) 33.6 µW/cm² = 0.336 W/m² UVA D3 regulating ( 315 nm - 335 nm) 52.2 µW/cm² = 0.522 W/m² UVA (EU) ( 315 nm - 380 nm) 124 µW/cm² = 1.24 W/m² UVA2 (medical definition) ( 320 nm - 340 nm) 51.9 µW/cm² = 0.519 W/m² UVA (US) ( 320 nm - 380 nm) 112 µW/cm² = 1.12 W/m² UVA1 (variant) ( 335 nm - 380 nm) 71.9 µW/cm² = 0.719 W/m² UVA1 (medical) ( 340 nm - 400 nm) 65.3 µW/cm² = 0.653 W/m² vis. UVA ( 350 nm - 380 nm) 41.7 µW/cm² = 0.417 W/m² VIS Rep3 ( 350 nm - 600 nm) 756 µW/cm² = 7.56 W/m² VIS Rep4 ( 350 nm - 700 nm) 973 µW/cm² = 9.73 W/m² purple ( 380 nm - 420 nm) 44.2 µW/cm² = 0.442 W/m² VIS ( 380 nm - 780 nm) 986 µW/cm² = 9.86 W/m² PAR ( 400 nm - 700 nm) 926 µW/cm² = 9.26 W/m² blue ( 420 nm - 490 nm) 301 µW/cm² = 3.01 W/m² green ( 490 nm - 575 nm) 287 µW/cm² = 2.87 W/m² yellow ( 575 nm - 585 nm) 44.3 µW/cm² = 0.443 W/m² orange ( 585 nm - 650 nm) 166 µW/cm² = 1.66 W/m² red ( 650 nm - 780 nm) 143 µW/cm² = 1.43 W/m² IRA ( 700 nm - 1400 nm) 77.7 µW/cm² = 0.777 W/m² IRB ( 1400 nm - 3000 nm) 0 µW/cm² = 0 W/m²
Actionspectra
Erythema 3.19 UV-Index Pyrimidine dimerization of DNA 20.3 µW/cm² Photoceratitis 4.82 µW/cm² Photoconjunctivitis 0.155 µW/cm² DNA Damage 0.542 Vitamin D3 12.1 µW/cm² Photosynthesis 658 µW/cm² Luminosity 2530 lx Human L-Cone 372 µW/cm² Human M-Cone 326 µW/cm² Human S-Cone 244 µW/cm² CIE X 337 µW/cm² CIE Y 350 µW/cm² CIE Z 460 µW/cm² PAR 4370000 mol photons Extinction preD3 61.1 e-3*m²/mol Extinction Tachysterol 219 e-3*m²/mol Exctincition PreD3 29900 m²/mol Extinction Lumisterol 17.7 m²/mol Exctincition Tachysterol 297000 m²/mol Extinction 7DHC 20.1 m²/mol L-Cone 307 µW/cm² M-Cone 360 µW/cm² S-Cone 409 µW/cm² U-Cone 114 µW/cm² UVR - ICNIRP 2004 3.16 Rel Biol Eff Melatonin Supression 338 µW/cm² Blue Light Hazard 265 µW/cm² (105 µW/cm² per 1000 lx) CIE 174:2006 PreVit D3 13.2 µW/cm² Lumen Reptil 2730 "pseudo-lx" Vitamin D3 Degradation 9.85 µW/cm² Actinic UV 3.12 µW/cm² (12.4 mW/klm) Exctincition Lumisterol 22600 m²/mol Exctincition 7DHC 24800 m²/mol Exctincition Toxisterols 4010 m²/mol
Broadbandmeters
Solarmeter 6.2 (UVB, pre 2010) 54.5 µW/cm² Solarmeter 6.5 (UV-Index, pre 2010) 3.48 Leybold UVB 40.2 µW/cm² Leybold UVA 76.7 µW/cm² Leybold UVC 0.012 µW/cm² DeltaOhm UVB 76.9 µW/cm² DeltaOhm UVC 10.5 µW/cm² Vernier UVB 17.8 µW/cm² Vernier UVA 88.8 µW/cm² Gröbel UVA 104 µW/cm² Gröbel UVB 23.5 µW/cm² Gröbel UVC -0.0104 µW/cm² Solarmeter 6.4 (D3) 10.9 IU/min UVX-31 83.3 µW/cm² IL UVB 0.0233 µW/cm² IL UVA 90 µW/cm² Solarmeter 6.5 (UVI, post 2010) 2.61 UV-Index Solarmeter 6.2 (UVB, post 2010) 33.6 µW/cm² (Solarmeter Ratio = 12.9) Solarmeter AlGaN 6.5 UVI sensor 28.3 UV Index GenUV 7.1 UV-Index 1.5 UV-Index Solarmeter 10.0 (Global Power) 11.2 W/m² Solarmeter 4.0 (UVA) 1.22 mW/cm² LS122 0.00653 W/m² ISM400 7.8 W/m²