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Spectrum 468: BSR3 Edit
DeleteMeasurement
| Brand |
Econlux/Terra-Solutions Econlux GmbH www.terra-solutions.de www.econlux.de |
|---|---|
| Lamp Product |
Solar Raptor 35W PAR20-Spot >105 µW/cm² @ 30cm size: 63mm x 95mm 25° |
| Lamp ID |
BSR3 (05/2010) 35watt Solar Raptor PRO Wide Beam (early model) |
| Spectrometer | USB2000+ (2) |
| Ballast | 35W EVG |
| Reflector | |
| Distance | 30 cm |
| Age | 105 hours |
| Originator (measurement) | Frances Baines |
Database entry created:
Frances Baines
12/Feb/2012 ; updated:
Thomas Griffiths (Tomaskas Ltd.)
26/Nov/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.
WARNING: The measurement range (350 - 800 nm) is not sufficient for this evaluation! Data is only available in the range 275.24 - 750.24 nm. Results are shown anyway but should be ignored by anyone except experts.
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 | ( 0.31 ; 0.35 ) | ( 0.21 ; 0.41 ) | ( 0.25 ; 0.16 ; 0.31 ) |
| CCT | 6400 Kelvin | 14000 Kelvin | 7500 Kelvin |
| distance | 0.092 | 0.11 | |
| 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) 16600 µW/cm² = 166 W/m² UVC ( 0 nm - 280 nm) 3.32 µW/cm² = 0.0332 W/m² non-terrestrial ( 0 nm - 290 nm) 10.2 µW/cm² = 0.102 W/m² total2 ( 250 nm - 880 nm) 16600 µW/cm² = 166 W/m² UVB (EU) ( 280 nm - 315 nm) 91.2 µW/cm² = 0.912 W/m² UVB (US) ( 280 nm - 320 nm) 123 µW/cm² = 1.23 W/m² UVA+B ( 280 nm - 380 nm) 2600 µW/cm² = 26 W/m² Solar UVB ( 290 nm - 315 nm) 84.3 µW/cm² = 0.843 W/m² UVA D3 regulating ( 315 nm - 335 nm) 153 µW/cm² = 1.53 W/m² UVA (EU) ( 315 nm - 380 nm) 2510 µW/cm² = 25.1 W/m² UVA2 (medical definition) ( 320 nm - 340 nm) 184 µW/cm² = 1.84 W/m² UVA (US) ( 320 nm - 380 nm) 2480 µW/cm² = 24.8 W/m² UVA1 (variant) ( 335 nm - 380 nm) 2360 µW/cm² = 23.6 W/m² UVA1 (medical) ( 340 nm - 400 nm) 2960 µW/cm² = 29.6 W/m² vis. UVA ( 350 nm - 380 nm) 2170 µW/cm² = 21.7 W/m² VIS Rep3 ( 350 nm - 600 nm) 13900 µW/cm² = 139 W/m² VIS Rep4 ( 350 nm - 700 nm) 15700 µW/cm² = 157 W/m² purple ( 380 nm - 420 nm) 1980 µW/cm² = 19.8 W/m² VIS ( 380 nm - 780 nm) 14000 µW/cm² = 140 W/m² PAR ( 400 nm - 700 nm) 12900 µW/cm² = 129 W/m² blue ( 420 nm - 490 nm) 3580 µW/cm² = 35.8 W/m² green ( 490 nm - 575 nm) 4170 µW/cm² = 41.7 W/m² yellow ( 575 nm - 585 nm) 882 µW/cm² = 8.82 W/m² orange ( 585 nm - 650 nm) 2150 µW/cm² = 21.5 W/m² red ( 650 nm - 780 nm) 1230 µW/cm² = 12.3 W/m² IRA ( 700 nm - 1400 nm) 464 µW/cm² = 4.64 W/m² IRB ( 1400 nm - 3000 nm) 0 µW/cm² = 0 W/m²
Actionspectra
Erythema 10.6 UV-Index Pyrimidine dimerization of DNA 42 µW/cm² Photoceratitis 15.9 µW/cm² Photoconjunctivitis 3.41 µW/cm² DNA Damage 6.66 Vitamin D3 27.9 µW/cm² Photosynthesis 8640 µW/cm² Luminosity 41800 lx Human L-Cone 6160 µW/cm² Human M-Cone 5380 µW/cm² Human S-Cone 3280 µW/cm² CIE X 5250 µW/cm² CIE Y 5880 µW/cm² CIE Z 5640 µW/cm² PAR 60400000 mol photons Extinction preD3 194 e-3*m²/mol Extinction Tachysterol 697 e-3*m²/mol Exctincition PreD3 122000 m²/mol Extinction Lumisterol 102 m²/mol Exctincition Tachysterol 989000 m²/mol Extinction 7DHC 131 m²/mol L-Cone 5080 µW/cm² M-Cone 3240 µW/cm² S-Cone 6430 µW/cm² U-Cone 5900 µW/cm² UVR - ICNIRP 2004 14.7 Rel Biol Eff Melatonin Supression 3990 µW/cm² Blue Light Hazard 3990 µW/cm² (95.3 µW/cm² per 1000 lx) CIE 174:2006 PreVit D3 28.7 µW/cm² Lumen Reptil 45000 "pseudo-lx" Vitamin D3 Degradation 29.6 µW/cm² Actinic UV 14.6 µW/cm² (3.49 mW/klm) Exctincition Lumisterol 123000 m²/mol Exctincition 7DHC 149000 m²/mol Exctincition Toxisterols 15700 m²/mol
Broadbandmeters
Solarmeter 6.2 (UVB, pre 2010) 159 µW/cm² Solarmeter 6.5 (UV-Index, pre 2010) 9.67 Leybold UVB 98.5 µW/cm² Leybold UVA 1810 µW/cm² Leybold UVC 0.743 µW/cm² DeltaOhm UVB 230 µW/cm² DeltaOhm UVC 29.5 µW/cm² Vernier UVB 36.7 µW/cm² Vernier UVA 1040 µW/cm² Gröbel UVA 2070 µW/cm² Gröbel UVB 60.8 µW/cm² Gröbel UVC 1.71 µW/cm² Solarmeter 6.4 (D3) 30.2 IU/min UVX-31 335 µW/cm² IL UVB 0.0716 µW/cm² IL UVA 2290 µW/cm² Solarmeter 6.5 (UVI, post 2010) 6.29 UV-Index Solarmeter 6.2 (UVB, post 2010) 89.3 µW/cm² (Solarmeter Ratio = 14.2) Solarmeter AlGaN 6.5 UVI sensor 69.8 UV Index GenUV 7.1 UV-Index 4.41 UV-Index Solarmeter 10.0 (Global Power) 148 W/m² Solarmeter 4.0 (UVA) 34.4 mW/cm² LS122 0 W/m² ISM400 91.5 W/m²