Model "Tungsten Lamp Model 2024 v4.1"
Spectrum 800: Q3000 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 |
Q3000 (01/2024) 3000 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 |
Database entry created:
Sarina Wunderlich
3/Jul/2024 ; updated:
Sarina Wunderlich
3/Jul/2024
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 | ( 0.43 ; 0.4 ) | ( 0.57 ; 0.3 ) | ( 0.5 ; 0.29 ; 0.15 ) |
| CCT | 3100 Kelvin | 3000 Kelvin | 3100 Kelvin |
| distance | 0.002 | 0.0019 | |
| 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) 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) 28100 µW/cm² = 281 W/m² UVB (EU) ( 280 nm - 315 nm) 0.231 µW/cm² = 0.00231 W/m² UVB (US) ( 280 nm - 320 nm) 1.14 µW/cm² = 0.0114 W/m² UVA+B ( 280 nm - 380 nm) 150 µW/cm² = 1.5 W/m² Solar UVB ( 290 nm - 315 nm) 0.231 µW/cm² = 0.00231 W/m² UVA D3 regulating ( 315 nm - 335 nm) 9.83 µW/cm² = 0.0983 W/m² UVA (EU) ( 315 nm - 380 nm) 150 µW/cm² = 1.5 W/m² UVA2 (medical definition) ( 320 nm - 340 nm) 14.9 µW/cm² = 0.149 W/m² UVA (US) ( 320 nm - 380 nm) 149 µW/cm² = 1.49 W/m² UVA1 (variant) ( 335 nm - 380 nm) 140 µW/cm² = 1.4 W/m² UVA1 (medical) ( 340 nm - 400 nm) 271 µW/cm² = 2.71 W/m² vis. UVA ( 350 nm - 380 nm) 115 µW/cm² = 1.15 W/m² VIS Rep3 ( 350 nm - 600 nm) 6260 µW/cm² = 62.6 W/m² VIS Rep4 ( 350 nm - 700 nm) 12900 µW/cm² = 129 W/m² purple ( 380 nm - 420 nm) 332 µW/cm² = 3.32 W/m² VIS ( 380 nm - 780 nm) 19300 µW/cm² = 193 W/m² VIS2 ( 400 nm - 680 nm) 11200 µW/cm² = 112 W/m² PAR ( 400 nm - 700 nm) 12700 µW/cm² = 127 W/m² tmp ( 400 nm - 1100 nm) 46100 µW/cm² = 461 W/m² blue ( 420 nm - 490 nm) 1290 µW/cm² = 12.9 W/m² green ( 490 nm - 575 nm) 3210 µW/cm² = 32.1 W/m² yellow ( 575 nm - 585 nm) 506 µW/cm² = 5.06 W/m² orange ( 585 nm - 650 nm) 3900 µW/cm² = 39 W/m² red ( 650 nm - 780 nm) 10100 µW/cm² = 101 W/m² IRA ( 700 nm - 1400 nm) 53200 µW/cm² = 532 W/m² IR2 ( 720 nm - 1100 nm) 31900 µW/cm² = 319 W/m² IRB ( 1400 nm - 3000 nm) 33800 µW/cm² = 338 W/m²
Actionspectra
Erythema 0.0499 UV-Index Pyrimidine dimerization of DNA 0.372 µW/cm² Photoceratitis 0.00671 µW/cm² Photoconjunctivitis 0 µW/cm² DNA Damage 0.000291 Vitamin D3 0.00809 µW/cm² Photosynthesis 8970 µW/cm² Luminosity 34600 lx Human L-Cone 5410 µW/cm² Human M-Cone 3840 µW/cm² Human S-Cone 1020 µW/cm² CIE X 5160 µW/cm² CIE Y 4820 µW/cm² CIE Z 1960 µW/cm² PAR 63200000 mol photons Extinction preD3 1.25 e-3*m²/mol Extinction Tachysterol 5.27 e-3*m²/mol Exctincition PreD3 1110 m²/mol Extinction Lumisterol 0 m²/mol Exctincition Tachysterol 15400 m²/mol Extinction 7DHC 0 m²/mol L-Cone 5020 µW/cm² M-Cone 2920 µW/cm² S-Cone 1540 µW/cm² U-Cone 653 µW/cm² UVR - ICNIRP 2004 0.0298 Rel Biol Eff Melatonin Supression 1770 µW/cm² Blue Light Hazard 1160 µW/cm² (33.6 µW/cm² per 1000 lx) CIE 174:2006 PreVit D3 0.00786 µW/cm² Lumen Reptil 26600 "pseudo-lx" Vitamin D3 Degradation 0.264 µW/cm² Actinic UV 0.0298 µW/cm² (0.00861 mW/klm) Exctincition Lumisterol 55.9 m²/mol Exctincition 7DHC 9.8 m²/mol Exctincition Toxisterols 421 m²/mol
Broadbandmeters
Solarmeter 6.2 (UVB, pre 2010) 3.22 µW/cm² Solarmeter 6.5 (UV-Index, pre 2010) 0.0274 Leybold UVB 1.41 µW/cm² Leybold UVA 118 µW/cm² Leybold UVC 0 µW/cm² DeltaOhm UVB 11.2 µW/cm² DeltaOhm UVC 0.403 µW/cm² Vernier UVB 0.0744 µW/cm² Vernier UVA 74.7 µW/cm² Gröbel UVA 123 µW/cm² Gröbel UVB 0.655 µW/cm² Gröbel UVC -0.000326 µW/cm² Luxmeter 33400 lx Solarmeter 6.4 (D3) 0.0857 IU/min UVX-31 17.2 µW/cm² IL UVB 0.00205 µW/cm² IL UVA 143 µW/cm² Solarmeter 6.5 (UVI, post 2010) 0.0205 UV-Index Solarmeter 6.2 (UVB, post 2010) 2.2 µW/cm² (Solarmeter Ratio = 107) Solarmeter AlGaN 6.5 UVI sensor 0.342 UV Index GenUV 7.1 UV-Index 0.0675 UV-Index Solarmeter 10.0 (Global Power) (manuf.) 689 W/m² Solarmeter 4.0 (UVA) 2.82 mW/cm² LS122 (manuf.) 769 W/m² ISM400 (first guess) 815 W/m² LS122 (assumption) 711 W/m² ISM400_new 956 W/m² Solarmeter 10.0 (Global Power) (assumption) 707 W/m²