Spectrum 505: MG-L1 Edit
DeleteMeasurement
| Brand |
Osram Osram GmbH http://www.osram.de/ |
|---|---|
| Lamp Product |
Biolux 965 |
| Lamp ID |
MG-L1 (08/2014) |
| Spectrometer | - |
| Ballast | - no ballast or default/unknown ballast - |
| Reflector | |
| Distance | 0 cm |
| Age | 0 hours |
| Originator (measurement) | Markus Grimm |
Database entry created:
Sarina Wunderlich
23/Aug/2014 ; updated:
Sarina Wunderlich
23/Aug/2014
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 | ( 0.27 ; 0.3 ) | ( 0.45 ; 0.45 ) | ( 0.23 ; 0.35 ; 0.35 ) |
| CCT | 11000 Kelvin | 4400 Kelvin | 5700 Kelvin |
| distance | 0.12 | 0.13 | |
| 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) 459000 µW/cm² = 4590 W/m² UVC ( 0 nm - 280 nm) 1490 µW/cm² = 14.9 W/m² non-terrestrial ( 0 nm - 290 nm) 1630 µW/cm² = 16.3 W/m² total2 ( 250 nm - 880 nm) 432000 µW/cm² = 4320 W/m² UVB (EU) ( 280 nm - 315 nm) 885 µW/cm² = 8.85 W/m² UVB (US) ( 280 nm - 320 nm) 992 µW/cm² = 9.92 W/m² UVA+B ( 280 nm - 380 nm) 8750 µW/cm² = 87.5 W/m² Solar UVB ( 290 nm - 315 nm) 751 µW/cm² = 7.51 W/m² UVA D3 regulating ( 315 nm - 335 nm) 588 µW/cm² = 5.88 W/m² UVA (EU) ( 315 nm - 380 nm) 7860 µW/cm² = 78.6 W/m² UVA2 (medical definition) ( 320 nm - 340 nm) 638 µW/cm² = 6.38 W/m² UVA (US) ( 320 nm - 380 nm) 7760 µW/cm² = 77.6 W/m² UVA1 (variant) ( 335 nm - 380 nm) 7270 µW/cm² = 72.7 W/m² UVA1 (medical) ( 340 nm - 400 nm) 16900 µW/cm² = 169 W/m² vis. UVA ( 350 nm - 380 nm) 6620 µW/cm² = 66.2 W/m² VIS Rep3 ( 350 nm - 600 nm) 353000 µW/cm² = 3530 W/m² VIS Rep4 ( 350 nm - 700 nm) 418000 µW/cm² = 4180 W/m² purple ( 380 nm - 420 nm) 21000 µW/cm² = 210 W/m² VIS ( 380 nm - 780 nm) 416000 µW/cm² = 4160 W/m² PAR ( 400 nm - 700 nm) 401000 µW/cm² = 4010 W/m² blue ( 420 nm - 490 nm) 160000 µW/cm² = 1600 W/m² green ( 490 nm - 575 nm) 136000 µW/cm² = 1360 W/m² yellow ( 575 nm - 585 nm) 12700 µW/cm² = 127 W/m² orange ( 585 nm - 650 nm) 65700 µW/cm² = 657 W/m² red ( 650 nm - 780 nm) 20600 µW/cm² = 206 W/m² IRA ( 700 nm - 1400 nm) 37600 µW/cm² = 376 W/m² IRB ( 1400 nm - 3000 nm) 0 µW/cm² = 0 W/m²
Actionspectra
Erythema 300 UV-Index Pyrimidine dimerization of DNA 580 µW/cm² Photoceratitis 378 µW/cm² Photoconjunctivitis 619 µW/cm² DNA Damage 857 Vitamin D3 527 µW/cm² Photosynthesis 287000 µW/cm² Luminosity 1120000 lx Human L-Cone 162000 µW/cm² Human M-Cone 151000 µW/cm² Human S-Cone 121000 µW/cm² CIE X 140000 µW/cm² CIE Y 155000 µW/cm² CIE Z 228000 µW/cm² PAR 1760000000 mol photons Extinction preD3 8360 e-3*m²/mol Extinction Tachysterol 16400 e-3*m²/mol Exctincition PreD3 6360000 m²/mol Extinction Lumisterol 5530 m²/mol Exctincition Tachysterol 19300000 m²/mol Extinction 7DHC 5770 m²/mol L-Cone 128000 µW/cm² M-Cone 193000 µW/cm² S-Cone 194000 µW/cm² U-Cone 41400 µW/cm² UVR - ICNIRP 2004 624 Rel Biol Eff Melatonin Supression 174000 µW/cm² Blue Light Hazard 135000 µW/cm² (120 µW/cm² per 1000 lx) CIE 174:2006 PreVit D3 580 µW/cm² Lumen Reptil 1280000 "pseudo-lx" Vitamin D3 Degradation 419 µW/cm² Actinic UV 627 µW/cm² (5.6 mW/klm) Exctincition Lumisterol 5040000 m²/mol Exctincition 7DHC 5710000 m²/mol Exctincition Toxisterols 4020000 m²/mol
Broadbandmeters
Solarmeter 6.2 (UVB, pre 2010) 1700 µW/cm² Solarmeter 6.5 (UV-Index, pre 2010) 192 Leybold UVB 832 µW/cm² Leybold UVA 6340 µW/cm² Leybold UVC 468 µW/cm² DeltaOhm UVB 1250 µW/cm² DeltaOhm UVC 834 µW/cm² Vernier UVB 657 µW/cm² Vernier UVA 3480 µW/cm² Gröbel UVA 6640 µW/cm² Gröbel UVB 771 µW/cm² Gröbel UVC 531 µW/cm² Solarmeter 6.4 (D3) 600 IU/min UVX-31 1690 µW/cm² IL UVB 0.708 µW/cm² IL UVA 7410 µW/cm² Solarmeter 6.5 (UVI, post 2010) 139 UV-Index Solarmeter 6.2 (UVB, post 2010) 738 µW/cm² (Solarmeter Ratio = 5.31) Solarmeter AlGaN 6.5 UVI sensor 901 UV Index GenUV 7.1 UV-Index 63.1 UV-Index Solarmeter 10.0 (Global Power) 4460 W/m² Solarmeter 4.0 (UVA) 148 mW/cm² LS122 181 W/m² ISM400 3060 W/m²