100 hours burn-in, different spectrum
Spectrum 611: FL-160W-MVB Edit
DeleteMeasurement
| Brand |
Flukers American Brand |
|---|---|
| Lamp Product |
Flukers Sun Spot 160W Mercury Vapour Bulb - 160W - Made in China |
| Lamp ID |
FL-160W-MVB (08/2022) Fluker's 160W MVB |
| Spectrometer | FLAME UV-Vis (E) |
| Ballast | - no ballast or default/unknown ballast - |
| Reflector | |
| Distance | 30 cm |
| Age | 100 hours |
| Originator (measurement) | Thomas Griffiths |
Database entry created:
Thomas Griffiths (Tomaskas Ltd.)
5/Sep/2022 ; updated:
Thomas Griffiths (Tomaskas Ltd.)
5/Sep/2022
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 | ( 0.35 ; 0.39 ) | ( 0.14 ; 0.35 ) | ( 0.3 ; 0.097 ; 0.25 ) |
| CCT | 4900 Kelvin | 0 Kelvin | 6500 Kelvin |
| distance | 0 | 0.17 | |
| 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) 3550 µW/cm² = 35.5 W/m² UVC ( 0 nm - 280 nm) 81.4 µW/cm² = 0.814 W/m² non-terrestrial ( 0 nm - 290 nm) 83.6 µW/cm² = 0.836 W/m² total2 ( 250 nm - 880 nm) 3420 µW/cm² = 34.2 W/m² UVB (EU) ( 280 nm - 315 nm) 64.8 µW/cm² = 0.648 W/m² UVB (US) ( 280 nm - 320 nm) 69 µW/cm² = 0.69 W/m² UVA+B ( 280 nm - 380 nm) 594 µW/cm² = 5.94 W/m² Solar UVB ( 290 nm - 315 nm) 62.6 µW/cm² = 0.626 W/m² UVA D3 regulating ( 315 nm - 335 nm) 28.2 µW/cm² = 0.282 W/m² UVA (EU) ( 315 nm - 380 nm) 530 µW/cm² = 5.3 W/m² UVA2 (medical definition) ( 320 nm - 340 nm) 33.9 µW/cm² = 0.339 W/m² UVA (US) ( 320 nm - 380 nm) 525 µW/cm² = 5.25 W/m² UVA1 (variant) ( 335 nm - 380 nm) 501 µW/cm² = 5.01 W/m² UVA1 (medical) ( 340 nm - 400 nm) 510 µW/cm² = 5.1 W/m² vis. UVA ( 350 nm - 380 nm) 481 µW/cm² = 4.81 W/m² VIS Rep3 ( 350 nm - 600 nm) 1960 µW/cm² = 19.6 W/m² VIS Rep4 ( 350 nm - 700 nm) 2260 µW/cm² = 22.6 W/m² purple ( 380 nm - 420 nm) 186 µW/cm² = 1.86 W/m² VIS ( 380 nm - 780 nm) 2160 µW/cm² = 21.6 W/m² VIS2 ( 400 nm - 680 nm) 1680 µW/cm² = 16.8 W/m² PAR ( 400 nm - 700 nm) 1760 µW/cm² = 17.6 W/m² tmp ( 400 nm - 1100 nm) 2850 µW/cm² = 28.5 W/m² blue ( 420 nm - 490 nm) 345 µW/cm² = 3.45 W/m² green ( 490 nm - 575 nm) 487 µW/cm² = 4.87 W/m² yellow ( 575 nm - 585 nm) 428 µW/cm² = 4.28 W/m² orange ( 585 nm - 650 nm) 160 µW/cm² = 1.6 W/m² red ( 650 nm - 780 nm) 555 µW/cm² = 5.55 W/m² IRA ( 700 nm - 1400 nm) 1090 µW/cm² = 10.9 W/m² IR2 ( 720 nm - 1100 nm) 1010 µW/cm² = 10.1 W/m² IRB ( 1400 nm - 3000 nm) 0 µW/cm² = 0 W/m²
Actionspectra
Erythema 8.39 UV-Index Pyrimidine dimerization of DNA 26.5 µW/cm² Photoceratitis 11.4 µW/cm² Photoconjunctivitis 19.6 µW/cm² DNA Damage 28.8 Vitamin D3 18.5 µW/cm² Photosynthesis 1140 µW/cm² Luminosity 6430 lx Human L-Cone 962 µW/cm² Human M-Cone 799 µW/cm² Human S-Cone 340 µW/cm² CIE X 825 µW/cm² CIE Y 912 µW/cm² CIE Z 597 µW/cm² PAR 9010000 mol photons Extinction preD3 293 e-3*m²/mol Extinction Tachysterol 557 e-3*m²/mol Exctincition PreD3 187000 m²/mol Extinction Lumisterol 158 m²/mol Exctincition Tachysterol 632000 m²/mol Extinction 7DHC 146 m²/mol L-Cone 840 µW/cm² M-Cone 277 µW/cm² S-Cone 698 µW/cm² U-Cone 1030 µW/cm² UVR - ICNIRP 2004 19.7 Rel Biol Eff Melatonin Supression 393 µW/cm² Blue Light Hazard 392 µW/cm² (61 µW/cm² per 1000 lx) CIE 174:2006 PreVit D3 19.3 µW/cm² Lumen Reptil 6100 "pseudo-lx" Vitamin D3 Degradation 16.1 µW/cm² Actinic UV 19.5 µW/cm² (30.4 mW/klm) Exctincition Lumisterol 122000 m²/mol Exctincition 7DHC 135000 m²/mol Exctincition Toxisterols 128000 m²/mol
Broadbandmeters
Solarmeter 6.2 (UVB, pre 2010) 82.8 µW/cm² Solarmeter 6.5 (UV-Index, pre 2010) 5.79 Leybold UVB 56 µW/cm² Leybold UVA 363 µW/cm² Leybold UVC 13.7 µW/cm² DeltaOhm UVB 80 µW/cm² DeltaOhm UVC 37.4 µW/cm² Vernier UVB 24 µW/cm² Vernier UVA 209 µW/cm² Gröbel UVA 455 µW/cm² Gröbel UVB 36.3 µW/cm² Gröbel UVC 17 µW/cm² Luxmeter 6840 lx Solarmeter 6.4 (D3) 18.1 IU/min UVX-31 102 µW/cm² IL UVB 0.0331 µW/cm² IL UVA 487 µW/cm² Solarmeter 6.5 (UVI, post 2010) 4.49 UV-Index Solarmeter 6.2 (UVB, post 2010) 41.9 µW/cm² (Solarmeter Ratio = 9.34) Solarmeter AlGaN 6.5 UVI sensor 46 UV Index GenUV 7.1 UV-Index 2.95 UV-Index Solarmeter 10.0 (Global Power) (manuf.) 39.3 W/m² Solarmeter 4.0 (UVA) 6.5 mW/cm² LS122 (manuf.) 1.55 W/m² ISM400 (first guess) 36.1 W/m² LS122 (assumption) 2.38 W/m² ISM400_new 36 W/m² Solarmeter 10.0 (Global Power) (assumption) 37.9 W/m²