Spectrum 334: BO1 Edit
DeleteMeasurement
| Brand |
Osram Osram GmbH http://www.osram.de/ |
|---|---|
| Lamp Product |
Ultravitalux 300W |
| Lamp ID |
BO1 (04/2009) |
| Spectrometer | USB2000+ |
| Ballast | - no ballast or default/unknown ballast - |
| Reflector | |
| Distance | 30 cm |
| Age | 109 hours |
| Originator (measurement) | Frances Baines |
Database entry created:
Sarina Wunderlich
6/Sep/2010 ; updated:
Sarina Wunderlich
27/Feb/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.
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 | ( 0.32 ; 0.36 ) | ( 0.12 ; 0.39 ) | ( 0.25 ; 0.092 ; 0.29 ) |
| CCT | 6000 Kelvin | 0 Kelvin | 10000 Kelvin |
| distance | 0 | 0.16 | |
| 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) 13800 µW/cm² = 138 W/m² UVC ( 0 nm - 280 nm) 1.3 µW/cm² = 0.013 W/m² non-terrestrial ( 0 nm - 290 nm) 9.42 µW/cm² = 0.0942 W/m² total2 ( 250 nm - 880 nm) 13800 µW/cm² = 138 W/m² UVB (EU) ( 280 nm - 315 nm) 601 µW/cm² = 6.01 W/m² UVB (US) ( 280 nm - 320 nm) 642 µW/cm² = 6.42 W/m² UVA+B ( 280 nm - 380 nm) 3620 µW/cm² = 36.2 W/m² Solar UVB ( 290 nm - 315 nm) 593 µW/cm² = 5.93 W/m² UVA D3 regulating ( 315 nm - 335 nm) 240 µW/cm² = 2.4 W/m² UVA (EU) ( 315 nm - 380 nm) 3020 µW/cm² = 30.2 W/m² UVA2 (medical definition) ( 320 nm - 340 nm) 257 µW/cm² = 2.57 W/m² UVA (US) ( 320 nm - 380 nm) 2980 µW/cm² = 29.8 W/m² UVA1 (variant) ( 335 nm - 380 nm) 2780 µW/cm² = 27.8 W/m² UVA1 (medical) ( 340 nm - 400 nm) 2840 µW/cm² = 28.4 W/m² vis. UVA ( 350 nm - 380 nm) 2650 µW/cm² = 26.5 W/m² VIS Rep3 ( 350 nm - 600 nm) 10900 µW/cm² = 109 W/m² VIS Rep4 ( 350 nm - 700 nm) 11600 µW/cm² = 116 W/m² purple ( 380 nm - 420 nm) 1180 µW/cm² = 11.8 W/m² VIS ( 380 nm - 780 nm) 9690 µW/cm² = 96.9 W/m² VIS2 ( 400 nm - 680 nm) 8650 µW/cm² = 86.5 W/m² PAR ( 400 nm - 700 nm) 8840 µW/cm² = 88.4 W/m² tmp ( 400 nm - 1100 nm) 10100 µW/cm² = 101 W/m² blue ( 420 nm - 490 nm) 2330 µW/cm² = 23.3 W/m² green ( 490 nm - 575 nm) 2500 µW/cm² = 25 W/m² yellow ( 575 nm - 585 nm) 2090 µW/cm² = 20.9 W/m² orange ( 585 nm - 650 nm) 440 µW/cm² = 4.4 W/m² red ( 650 nm - 780 nm) 1160 µW/cm² = 11.6 W/m² IRA ( 700 nm - 1400 nm) 1250 µW/cm² = 12.5 W/m² IR2 ( 720 nm - 1100 nm) 1070 µW/cm² = 10.7 W/m² IRB ( 1400 nm - 3000 nm) 0 µW/cm² = 0 W/m²
Actionspectra
Erythema 45.7 UV-Index Pyrimidine dimerization of DNA 261 µW/cm² Photoceratitis 71.8 µW/cm² Photoconjunctivitis 3.76 µW/cm² DNA Damage 9.97 Vitamin D3 168 µW/cm² Photosynthesis 5750 µW/cm² Luminosity 31500 lx Human L-Cone 4650 µW/cm² Human M-Cone 4040 µW/cm² Human S-Cone 2270 µW/cm² CIE X 3970 µW/cm² CIE Y 4460 µW/cm² CIE Z 3980 µW/cm² PAR 45200000 mol photons Extinction preD3 834 e-3*m²/mol Extinction Tachysterol 2920 e-3*m²/mol Exctincition PreD3 418000 m²/mol Extinction Lumisterol 266 m²/mol Exctincition Tachysterol 3770000 m²/mol Extinction 7DHC 304 m²/mol L-Cone 3950 µW/cm² M-Cone 1480 µW/cm² S-Cone 4680 µW/cm² U-Cone 5860 µW/cm² UVR - ICNIRP 2004 47.2 Rel Biol Eff Melatonin Supression 2540 µW/cm² Blue Light Hazard 2610 µW/cm² (83.1 µW/cm² per 1000 lx) CIE 174:2006 PreVit D3 178 µW/cm² Lumen Reptil 33200 "pseudo-lx" Vitamin D3 Degradation 129 µW/cm² Actinic UV 46.1 µW/cm² (14.6 mW/klm) Exctincition Lumisterol 337000 m²/mol Exctincition 7DHC 371000 m²/mol Exctincition Toxisterols 47500 m²/mol
Broadbandmeters
Solarmeter 6.2 (UVB, pre 2010) 678 µW/cm² Solarmeter 6.5 (UV-Index, pre 2010) 47.9 Leybold UVB 532 µW/cm² Leybold UVA 2070 µW/cm² Leybold UVC 0.699 µW/cm² DeltaOhm UVB 712 µW/cm² DeltaOhm UVC 109 µW/cm² Vernier UVB 232 µW/cm² Vernier UVA 1380 µW/cm² Gröbel UVA 2650 µW/cm² Gröbel UVB 329 µW/cm² Gröbel UVC 0.972 µW/cm² Luxmeter 34000 lx Solarmeter 6.4 (D3) 150 IU/min UVX-31 856 µW/cm² IL UVB 0.28 µW/cm² IL UVA 2770 µW/cm² Solarmeter 6.5 (UVI, post 2010) 35.4 UV-Index Solarmeter 6.2 (UVB, post 2010) 366 µW/cm² (Solarmeter Ratio = 10.3) Solarmeter AlGaN 6.5 UVI sensor 418 UV Index GenUV 7.1 UV-Index 21.7 UV-Index Solarmeter 10.0 (Global Power) (manuf.) 122 W/m² Solarmeter 4.0 (UVA) 37.2 mW/cm² LS122 (manuf.) 0.317 W/m² ISM400 (first guess) 81.3 W/m² LS122 (assumption) 4.04 W/m² ISM400_new 69.2 W/m² Solarmeter 10.0 (Global Power) (assumption) 110 W/m²