Spectrum 10: BBX1 Edit
DeleteMeasurement
| Brand |
Wolff Wolff System GmbH http://www.wolffsystem.de |
|---|---|
| Lamp Product |
Bellarium x'treme 25W UVA 12.5 mW/cm2, UVA 4,5W, UVB/UVA=2 .5%, http://www.wolffsystem.de/Datenblaetter/deutsch/730011_BELLARIUM_XTREME_25W_D.pdf |
| Lamp ID |
BBX1 (10/2007) |
| Spectrometer | USB 2000 |
| Ballast | - no ballast or default/unknown ballast - |
| Reflector | |
| Distance | 10 cm |
| Age | 105 hours |
| Originator (measurement) | Frances Baines |
Database entry created:
Sarina Wunderlich
12/Nov/2009 ; updated:
Sarina Wunderlich
9/Oct/2011
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 250.17 - 780.01 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 | ( 0.23 ; 0.25 ) | ( 0.021 ; 0.14 ) | ( 0.037 ; 0.021 ; 0.14 ) |
| CCT | 100000 Kelvin | 0 Kelvin | 0 Kelvin |
| distance | 0 | 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) 1250 µW/cm² = 12.5 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) 1250 µW/cm² = 12.5 W/m² UVB (EU) ( 280 nm - 315 nm) 19.8 µW/cm² = 0.198 W/m² UVB (US) ( 280 nm - 320 nm) 33.4 µW/cm² = 0.334 W/m² UVA+B ( 280 nm - 380 nm) 1020 µW/cm² = 10.2 W/m² Solar UVB ( 290 nm - 315 nm) 19.8 µW/cm² = 0.198 W/m² UVA D3 regulating ( 315 nm - 335 nm) 142 µW/cm² = 1.42 W/m² UVA (EU) ( 315 nm - 380 nm) 1000 µW/cm² = 10 W/m² UVA2 (medical definition) ( 320 nm - 340 nm) 217 µW/cm² = 2.17 W/m² UVA (US) ( 320 nm - 380 nm) 990 µW/cm² = 9.9 W/m² UVA1 (variant) ( 335 nm - 380 nm) 861 µW/cm² = 8.61 W/m² UVA1 (medical) ( 340 nm - 400 nm) 850 µW/cm² = 8.5 W/m² vis. UVA ( 350 nm - 380 nm) 549 µW/cm² = 5.49 W/m² VIS Rep3 ( 350 nm - 600 nm) 773 µW/cm² = 7.73 W/m² VIS Rep4 ( 350 nm - 700 nm) 773 µW/cm² = 7.73 W/m² purple ( 380 nm - 420 nm) 115 µW/cm² = 1.15 W/m² VIS ( 380 nm - 780 nm) 226 µW/cm² = 2.26 W/m² VIS2 ( 400 nm - 680 nm) 148 µW/cm² = 1.48 W/m² PAR ( 400 nm - 700 nm) 148 µW/cm² = 1.48 W/m² tmp ( 400 nm - 1100 nm) 150 µW/cm² = 1.5 W/m² blue ( 420 nm - 490 nm) 59.4 µW/cm² = 0.594 W/m² green ( 490 nm - 575 nm) 37.6 µW/cm² = 0.376 W/m² yellow ( 575 nm - 585 nm) 12.4 µW/cm² = 0.124 W/m² orange ( 585 nm - 650 nm) 0 µW/cm² = 0 W/m² red ( 650 nm - 780 nm) 1.69 µW/cm² = 0.0169 W/m² IRA ( 700 nm - 1400 nm) 1.66 µW/cm² = 0.0166 W/m² IR2 ( 720 nm - 1100 nm) 1.66 µW/cm² = 0.0166 W/m² IRB ( 1400 nm - 3000 nm) 0 µW/cm² = 0 W/m²
Actionspectra
Erythema 1.27 UV-Index Pyrimidine dimerization of DNA 12.5 µW/cm² Photoceratitis 1.65 µW/cm² Photoconjunctivitis 0.0254 µW/cm² DNA Damage 0.101 Vitamin D3 4.07 µW/cm² Photosynthesis 104 µW/cm² Luminosity 348 lx Human L-Cone 49.1 µW/cm² Human M-Cone 49.1 µW/cm² Human S-Cone 59.9 µW/cm² CIE X 46.1 µW/cm² CIE Y 48.9 µW/cm² CIE Z 104 µW/cm² PAR 811000 mol photons Extinction preD3 37.8 e-3*m²/mol Extinction Tachysterol 142 e-3*m²/mol Exctincition PreD3 24500 m²/mol Extinction Lumisterol 4.02 m²/mol Exctincition Tachysterol 306000 m²/mol Extinction 7DHC 4.22 m²/mol L-Cone 37.4 µW/cm² M-Cone 20.5 µW/cm² S-Cone 139 µW/cm² U-Cone 803 µW/cm² UVR - ICNIRP 2004 0.965 Rel Biol Eff Melatonin Supression 65.6 µW/cm² Blue Light Hazard 81.1 µW/cm² (233 µW/cm² per 1000 lx) CIE 174:2006 PreVit D3 4.22 µW/cm² Lumen Reptil 1500 "pseudo-lx" Vitamin D3 Degradation 7.67 µW/cm² Actinic UV 0.955 µW/cm² (27.5 mW/klm) Exctincition Lumisterol 6220 m²/mol Exctincition 7DHC 5700 m²/mol Exctincition Toxisterols 7260 m²/mol
Broadbandmeters
Solarmeter 6.2 (UVB, pre 2010) 52.1 µW/cm² Solarmeter 6.5 (UV-Index, pre 2010) 1.29 Leybold UVB 34.1 µW/cm² Leybold UVA 787 µW/cm² Leybold UVC 0.00215 µW/cm² DeltaOhm UVB 172 µW/cm² DeltaOhm UVC 13.2 µW/cm² Vernier UVB 7.7 µW/cm² Vernier UVA 566 µW/cm² Gröbel UVA 875 µW/cm² Gröbel UVB 17.3 µW/cm² Gröbel UVC -0.0143 µW/cm² Luxmeter 385 lx Solarmeter 6.4 (D3) 4.03 IU/min UVX-31 234 µW/cm² IL UVB 0.032 µW/cm² IL UVA 876 µW/cm² Solarmeter 6.5 (UVI, post 2010) 1.09 UV-Index Solarmeter 6.2 (UVB, post 2010) 39.3 µW/cm² (Solarmeter Ratio = 36) Solarmeter AlGaN 6.5 UVI sensor 16.6 UV Index GenUV 7.1 UV-Index 1.12 UV-Index Solarmeter 10.0 (Global Power) (manuf.) 6.14 W/m² Solarmeter 4.0 (UVA) 11.2 mW/cm² LS122 (manuf.) 0 W/m² ISM400 (first guess) 1.33 W/m² LS122 (assumption) 0.0245 W/m² ISM400_new 0.795 W/m² Solarmeter 10.0 (Global Power) (assumption) 3.4 W/m²