Model "Tungsten Lamp Model 2024 v4.1"
Spectrum 793: Q2200 Edit
DeleteMeasurement
Brand |
other other |
---|---|
Lamp Product |
Quentins Halogen Lamp Model Based on Planck Emission, Spectral Transmission of Glass, Spectral emissivity of tungsten and different temperatures, collected by Quentin Dishman |
Lamp ID |
Q2200 (07/2024) 2200 K filament temperature, Model "Tungsten Lamp Model 2024 v4.1" |
Spectrometer | - |
Ballast | - no ballast or default/unknown ballast - |
Reflector | |
Distance | 0 cm |
Age | 0 hours |
Originator (measurement) | Publication |
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 | ( 0.5 ; 0.42 ) | ( 0.71 ; 0.23 ) | ( 0.66 ; 0.24 ; 0.078 ) |
CCT | 2200 Kelvin | 2200 Kelvin | 2200 Kelvin |
distance | 0.00086 | 0.00094 | |
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
total ( 0 nm - 0 nm) 100000 µW/cm² = 1000 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) 11100 µW/cm² = 111 W/m² UVB (EU) ( 280 nm - 315 nm) 0.00425 µW/cm² = 4.25E-5 W/m² UVB (US) ( 280 nm - 320 nm) 0.0219 µW/cm² = 0.000219 W/m² UVA+B ( 280 nm - 380 nm) 5.61 µW/cm² = 0.0561 W/m² Solar UVB ( 290 nm - 315 nm) 0.00425 µW/cm² = 4.25E-5 W/m² UVA D3 regulating ( 315 nm - 335 nm) 0.226 µW/cm² = 0.00226 W/m² UVA (EU) ( 315 nm - 380 nm) 5.6 µW/cm² = 0.056 W/m² UVA2 (medical definition) ( 320 nm - 340 nm) 0.368 µW/cm² = 0.00368 W/m² UVA (US) ( 320 nm - 380 nm) 5.59 µW/cm² = 0.0559 W/m² UVA1 (variant) ( 335 nm - 380 nm) 5.38 µW/cm² = 0.0538 W/m² UVA1 (medical) ( 340 nm - 400 nm) 12.5 µW/cm² = 0.125 W/m² vis. UVA ( 350 nm - 380 nm) 4.66 µW/cm² = 0.0466 W/m² VIS Rep3 ( 350 nm - 600 nm) 1060 µW/cm² = 10.6 W/m² VIS Rep4 ( 350 nm - 700 nm) 3230 µW/cm² = 32.3 W/m² purple ( 380 nm - 420 nm) 20.4 µW/cm² = 0.204 W/m² VIS ( 380 nm - 780 nm) 6130 µW/cm² = 61.3 W/m² VIS2 ( 400 nm - 680 nm) 2660 µW/cm² = 26.6 W/m² PAR ( 400 nm - 700 nm) 3220 µW/cm² = 32.2 W/m² tmp ( 400 nm - 1100 nm) 25700 µW/cm² = 257 W/m² blue ( 420 nm - 490 nm) 136 µW/cm² = 1.36 W/m² green ( 490 nm - 575 nm) 583 µW/cm² = 5.83 W/m² yellow ( 575 nm - 585 nm) 117 µW/cm² = 1.17 W/m² orange ( 585 nm - 650 nm) 1090 µW/cm² = 10.9 W/m² red ( 650 nm - 780 nm) 4180 µW/cm² = 41.8 W/m² IRA ( 700 nm - 1400 nm) 44300 µW/cm² = 443 W/m² IR2 ( 720 nm - 1100 nm) 21900 µW/cm² = 219 W/m² IRB ( 1400 nm - 3000 nm) 52400 µW/cm² = 524 W/m²
Erythema 0.00166 UV-Index Pyrimidine dimerization of DNA 0.00799 µW/cm² Photoceratitis 0.000123 µW/cm² Photoconjunctivitis 0 µW/cm² DNA Damage 7.62E-6 Vitamin D3 0.000149 µW/cm² Photosynthesis 2360 µW/cm² Luminosity 7690 lx Human L-Cone 1240 µW/cm² Human M-Cone 771 µW/cm² Human S-Cone 106 µW/cm² CIE X 1290 µW/cm² CIE Y 1070 µW/cm² CIE Z 210 µW/cm² PAR 16700000 mol photons Extinction preD3 0.0253 e-3*m²/mol Extinction Tachysterol 0.107 e-3*m²/mol Exctincition PreD3 26 m²/mol Extinction Lumisterol 0 m²/mol Exctincition Tachysterol 368 m²/mol Extinction 7DHC 0 m²/mol L-Cone 1220 µW/cm² M-Cone 440 µW/cm² S-Cone 144 µW/cm² U-Cone 36.1 µW/cm² UVR - ICNIRP 2004 0.00104 Rel Biol Eff Melatonin Supression 210 µW/cm² Blue Light Hazard 121 µW/cm² (15.7 µW/cm² per 1000 lx) CIE 174:2006 PreVit D3 0.000145 µW/cm² Lumen Reptil 5230 "pseudo-lx" Vitamin D3 Degradation 0.00539 µW/cm² Actinic UV 0.00104 µW/cm² (0.00136 mW/klm) Exctincition Lumisterol 1.11 m²/mol Exctincition 7DHC 0.187 m²/mol Exctincition Toxisterols 10.6 m²/mol
Solarmeter 6.2 (UVB, pre 2010) 0.0871 µW/cm² Solarmeter 6.5 (UV-Index, pre 2010) 0.000783 Leybold UVB 0.0292 µW/cm² Leybold UVA 4.49 µW/cm² Leybold UVC 0 µW/cm² DeltaOhm UVB 0.272 µW/cm² DeltaOhm UVC 0.00815 µW/cm² Vernier UVB 0.00137 µW/cm² Vernier UVA 2.56 µW/cm² Gröbel UVA 4.51 µW/cm² Gröbel UVB 0.0155 µW/cm² Gröbel UVC -5.99E-6 µW/cm² Luxmeter 7060 lx Solarmeter 6.4 (D3) 0.00245 IU/min UVX-31 0.469 µW/cm² IL UVB 5.42E-5 µW/cm² IL UVA 5.54 µW/cm² Solarmeter 6.5 (UVI, post 2010) 0.000499 UV-Index Solarmeter 6.2 (UVB, post 2010) 0.0472 µW/cm² (Solarmeter Ratio = 94.7) Solarmeter AlGaN 6.5 UVI sensor 0.00748 UV Index GenUV 7.1 UV-Index 0.00229 UV-Index Solarmeter 10.0 (Global Power) (manuf.) 395 W/m² Solarmeter 4.0 (UVA) 0.125 mW/cm² LS122 (manuf.) 863 W/m² ISM400 (first guess) 497 W/m² LS122 (assumption) 792 W/m² ISM400_new 613 W/m² Solarmeter 10.0 (Global Power) (assumption) 407 W/m²