Spectrum #466 BO6 (Osram Ultravitalux 300W) Edit
Delete(1) Raw Measurement
| Lampid | BO6 |
|---|---|
| Spectrometer | USB2000+ (2) |
| Originator | Frances Baines |
| Ballast | - no ballast or default/unknown ballast - |
| Reflector | - no reflector - |
| Distance | 30 |
| Age | 1 |
created by Frances Baines, 12.02.2012; last updated by Frances Baines, 12.02.2012
Description
(2) Comparison of full spectrum to sunlight
The spectrum is compared to the ASTM spectrum. The measured spectrum is scaled to a lux or UVI value that seems to "make sense" to the database. This can go wrong, depending on the quality and range of the data.
(3) 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 (ASTM spectrum).
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 ; 0.37 ) | ( 0.13 ; 0.39 ) | ( 0.26 ; 0.093 ; 0.29 ) |
| CCT | 5800 Kelvin | 0 Kelvin | 9000 Kelvin |
| distance | 0 | 0.16 | |
| colour space | 3-D-graph not implemented yet |
(4) 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 readings of two solarmeters 6.2 (UVB) and 6.5 (UV index) has proven a useful and very simply number to acess the spectral shape in the vitamin-d3-active region.
(5) 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
(5a) Ranges
total ( 0 nm - 0 nm) 13200 µW/cm² = 132 W/m² UVC ( 0 nm - 280 nm) 0.156 µW/cm² = 0.00156 W/m² non-terrestrial ( 0 nm - 290 nm) 3.61 µW/cm² = 0.0361 W/m² total2 ( 250 nm - 880 nm) 13200 µW/cm² = 132 W/m² UVB (EU) ( 280 nm - 315 nm) 647 µW/cm² = 6.47 W/m² UVB (US) ( 280 nm - 320 nm) 696 µW/cm² = 6.96 W/m² UVA+B ( 280 nm - 380 nm) 3600 µW/cm² = 36 W/m² Solar UVB ( 290 nm - 315 nm) 643 µW/cm² = 6.43 W/m² UVA D3 regulating ( 315 nm - 335 nm) 236 µW/cm² = 2.36 W/m² UVA (EU) ( 315 nm - 380 nm) 2960 µW/cm² = 29.6 W/m² UVA2 (medical definition) ( 320 nm - 340 nm) 261 µW/cm² = 2.61 W/m² UVA (US) ( 320 nm - 380 nm) 2910 µW/cm² = 29.1 W/m² UVA1 (variant) ( 335 nm - 380 nm) 2720 µW/cm² = 27.2 W/m² UVA1 (medical) ( 340 nm - 400 nm) 2760 µW/cm² = 27.6 W/m² vis. UVA ( 350 nm - 380 nm) 2580 µW/cm² = 25.8 W/m² VIS Rep3 ( 350 nm - 600 nm) 11000 µW/cm² = 110 W/m² VIS Rep4 ( 350 nm - 700 nm) 11800 µW/cm² = 118 W/m² purple ( 380 nm - 420 nm) 1190 µW/cm² = 11.9 W/m² VIS ( 380 nm - 780 nm) 9630 µW/cm² = 96.3 W/m² VIS2 ( 400 nm - 680 nm) 8880 µW/cm² = 88.8 W/m² PAR ( 400 nm - 700 nm) 9070 µW/cm² = 90.7 W/m² tmp ( 400 nm - 1100 nm) 9520 µW/cm² = 95.2 W/m² blue ( 420 nm - 490 nm) 2300 µW/cm² = 23 W/m² green ( 490 nm - 575 nm) 2600 µW/cm² = 26 W/m² yellow ( 575 nm - 585 nm) 2230 µW/cm² = 22.3 W/m² orange ( 585 nm - 650 nm) 444 µW/cm² = 4.44 W/m² red ( 650 nm - 780 nm) 868 µW/cm² = 8.68 W/m² IR2 ( 655 nm - 685 nm) 232 µW/cm² = 2.32 W/m² IRA ( 700 nm - 1400 nm) 449 µW/cm² = 4.49 W/m² IRB ( 1400 nm - 3000 nm) 0 µW/cm² = 0 W/m²
(5b) Actionspectra
Erythema 46.6 UV-Index Pyrimidine dimerization of DNA 285 µW/cm² Photoceratitis 73.6 µW/cm² Photoconjunctivitis 2.11 µW/cm² DNA Damage 7.4 Vitamin D3 179 µW/cm² Photosynthesis 5850 µW/cm² Luminosity 33100 lx Human L-Cone 4880 µW/cm² Human M-Cone 4230 µW/cm² Human S-Cone 2250 µW/cm² CIE X 4140 µW/cm² CIE Y 4700 µW/cm² CIE Z 3940 µW/cm² PAR PPFD 464 µmol/m²/s Extinction preD3 870 e-3*m²/mol Extinction Tachysterol 3040 e-3*m²/mol Exctincition PreD3 420000 m²/mol Extinction Lumisterol 247 m²/mol Exctincition Tachysterol 3920000 m²/mol Extinction 7DHC 271 m²/mol L-Cone 4160 µW/cm² M-Cone 1500 µW/cm² S-Cone 4650 µW/cm² U-Cone 5770 µW/cm² UVR - ICNIRP 2004 45.8 Rel Biol Eff Melatonin Supression 2530 µW/cm² Blue Light Hazard 2590 µW/cm² (78.4 µW/cm² per 1000 lx) CIE 174:2006 PreVit D3 189 µW/cm² Lumen Reptil 33800 "pseudo-lx" Vitamin D3 Degradation 137 µW/cm² Actinic UV 44.5 µW/cm² (13.5 mW/klm) Exctincition Lumisterol 317000 m²/mol Exctincition 7DHC 338000 m²/mol Exctincition Toxisterols 48200 m²/mol
(5c) Broadbandmeters
Solarmeter 6.2 (UVB, pre 2010) 730 µW/cm² Solarmeter 6.5 (UV-Index, pre 2010) 50 Leybold UVB 579 µW/cm² Leybold UVA 2000 µW/cm² Leybold UVC 0.164 µW/cm² DeltaOhm UVB 767 µW/cm² DeltaOhm UVC 116 µW/cm² Vernier UVB 239 µW/cm² Vernier UVA 1300 µW/cm² Gröbel UVA 2590 µW/cm² Gröbel UVB 353 µW/cm² Gröbel UVC -0.0783 µW/cm² Luxmeter 35800 lx Solarmeter 6.4 (D3) 156 IU/min UVX-31 912 µW/cm² IL UVB 0.3 µW/cm² IL UVA 2700 µW/cm² Solarmeter 6.5 (UVI, post 2010) 37.5 UV-Index Solarmeter 6.2 (UVB, post 2010) 398 µW/cm² (Solarmeter Ratio = 10.6) Solarmeter AlGaN 6.5 UVI sensor 450 UV Index GenUV 7.1 UV-Index 23.3 UV-Index Solarmeter 10.0 (Global Power) (manuf.) 112 W/m² Solarmeter 4.0 (UVA) 36.5 mW/cm² LS122 (manuf.) 0 W/m² ISM400 (first guess) 66.2 W/m² LS122 (assumption) 3.36 W/m² ISM400_new 52.3 W/m² Solarmeter 10.0 (Global Power) (assumption) 98.9 W/m²
(5d) Summary of my favourites
| UVC (0nm -280nm) [µW/cm] | 0.156 | 0.00118 % |
| non-terrestrial (0nm -290nm) [µW/cm] | 3.61 | 0.0273 % |
| UVB (EU) (280nm -315nm) [µW/cm] | 647 | 4.89 % |
| UVB (US) (280nm -320nm) [µW/cm] | 696 | 5.26 % |
| Solar UVB (290nm -315nm) [µW/cm] | 643 | 4.86 % |
| UVA (EU) (315nm -380nm) [µW/cm] | 2960 | 22.3 % |
| UVA (US) (320nm -380nm) [µW/cm] | 2910 | 22 % |
| UVA2 (medical definition) (320nm -340nm) [µW/cm] | 261 | 1.97 % |
| UVA1 (medical) (340nm -400nm) [µW/cm] | 2760 | 20.8 % |
| UVA D3 regulating (315nm -335nm) [µW/cm] | 236 | 1.78 % |
| vis. UVA (350nm -380nm) [µW/cm] | 2580 | 19.5 % |
| VIS (380nm -780nm) [µW/cm] | 9630 | 72.8 % |
| blue (420nm -490nm) [µW/cm] | 2300 | 17.3 % |
| total2 (250nm -880nm) [µW/cm] | 13200 | 100 % |
| Erythema [UV-Index] | 46.6 | |
| Luminosity [lx] | 33100 | |
| Blue Light Hazard [µW/cm²] | 2590 | 78.4µW/cm/1000lx |
| Solarmeter 6.5 (UVI, post 2010) [UV-Index] | 37.5 | |
| Solarmeter 6.2 (UVB, post 2010) [µW/cm²] | 398 | |
| Actinic UV [µW/cm²] | 44.5 | 7.26 at UVI7.6 |
| Vitamin D3 [µW/cm²] | 179 | 29.1 at UVI7.6 |