Email 12.05.2021
Spectrum 566: SylvaniaActiva Edit
DeleteMeasurement
| Brand |
Sylvania Sylvania http://www.sylvania-lamps.com/ |
|---|---|
| Lamp Product |
Activa 172 18W |
| Lamp ID |
SylvaniaActiva (01/2021) |
| Spectrometer | - |
| Ballast | - no ballast or default/unknown ballast - |
| Reflector | |
| Distance | 0 cm |
| Age | 0 hours |
| Originator (measurement) | Manufacturer |
Database entry created:
Sarina Wunderlich
12/May/2021 ; updated:
Sarina Wunderlich
12/May/2021
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 | ( 0.29 ; 0.3 ) | ( 0.37 ; 0.41 ) | ( 0.23 ; 0.29 ; 0.32 ) |
| CCT | 8200 Kelvin | 5500 Kelvin | 6200 Kelvin |
| distance | 0.066 | 0.063 | |
| 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) 82.2 µW/cm² = 0.822 W/m² UVC ( 0 nm - 280 nm) 0.00192 µW/cm² = 1.92E-5 W/m² non-terrestrial ( 0 nm - 290 nm) 0.00292 µW/cm² = 2.92E-5 W/m² total2 ( 250 nm - 880 nm) 82.2 µW/cm² = 0.822 W/m² UVB (EU) ( 280 nm - 315 nm) 0.481 µW/cm² = 0.00481 W/m² UVB (US) ( 280 nm - 320 nm) 0.522 µW/cm² = 0.00522 W/m² UVA+B ( 280 nm - 380 nm) 6.51 µW/cm² = 0.0651 W/m² Solar UVB ( 290 nm - 315 nm) 0.48 µW/cm² = 0.0048 W/m² UVA D3 regulating ( 315 nm - 335 nm) 0.26 µW/cm² = 0.0026 W/m² UVA (EU) ( 315 nm - 380 nm) 6.04 µW/cm² = 0.0604 W/m² UVA2 (medical definition) ( 320 nm - 340 nm) 0.285 µW/cm² = 0.00285 W/m² UVA (US) ( 320 nm - 380 nm) 5.99 µW/cm² = 0.0599 W/m² UVA1 (variant) ( 335 nm - 380 nm) 5.77 µW/cm² = 0.0577 W/m² UVA1 (medical) ( 340 nm - 400 nm) 7.62 µW/cm² = 0.0762 W/m² vis. UVA ( 350 nm - 380 nm) 5.55 µW/cm² = 0.0555 W/m² VIS Rep3 ( 350 nm - 600 nm) 65.6 µW/cm² = 0.656 W/m² VIS Rep4 ( 350 nm - 700 nm) 79.1 µW/cm² = 0.791 W/m² purple ( 380 nm - 420 nm) 6.49 µW/cm² = 0.0649 W/m² VIS ( 380 nm - 780 nm) 75.5 µW/cm² = 0.755 W/m² VIS2 ( 400 nm - 680 nm) 71 µW/cm² = 0.71 W/m² PAR ( 400 nm - 700 nm) 71.6 µW/cm² = 0.716 W/m² tmp ( 400 nm - 1100 nm) 73.8 µW/cm² = 0.738 W/m² blue ( 420 nm - 490 nm) 24.8 µW/cm² = 0.248 W/m² green ( 490 nm - 575 nm) 23.7 µW/cm² = 0.237 W/m² yellow ( 575 nm - 585 nm) 2.25 µW/cm² = 0.0225 W/m² orange ( 585 nm - 650 nm) 14.4 µW/cm² = 0.144 W/m² red ( 650 nm - 780 nm) 3.93 µW/cm² = 0.0393 W/m² IRA ( 700 nm - 1400 nm) 2.21 µW/cm² = 0.0221 W/m² IR2 ( 720 nm - 1100 nm) 1.08 µW/cm² = 0.0108 W/m² IRB ( 1400 nm - 3000 nm) 0 µW/cm² = 0 W/m²
Actionspectra
Erythema 0.0175 UV-Index Pyrimidine dimerization of DNA 0.172 µW/cm² Photoceratitis 0.0322 µW/cm² Photoconjunctivitis 0.00208 µW/cm² DNA Damage 0.00351 Vitamin D3 0.0694 µW/cm² Photosynthesis 50.5 µW/cm² Luminosity 204 lx Human L-Cone 30.1 µW/cm² Human M-Cone 26.3 µW/cm² Human S-Cone 20.2 µW/cm² CIE X 27.3 µW/cm² CIE Y 28.2 µW/cm² CIE Z 37.5 µW/cm² PAR 329000 mol photons Extinction preD3 0.527 e-3*m²/mol Extinction Tachysterol 1.79 e-3*m²/mol Exctincition PreD3 248 m²/mol Extinction Lumisterol 0.0731 m²/mol Exctincition Tachysterol 2370 m²/mol Extinction 7DHC 0.0766 m²/mol L-Cone 24.3 µW/cm² M-Cone 31 µW/cm² S-Cone 34 µW/cm² U-Cone 18.3 µW/cm² UVR - ICNIRP 2004 0.0141 Rel Biol Eff Melatonin Supression 28.8 µW/cm² Blue Light Hazard 22.6 µW/cm² (111 µW/cm² per 1000 lx) CIE 174:2006 PreVit D3 0.0708 µW/cm² Lumen Reptil 239 "pseudo-lx" Vitamin D3 Degradation 0.091 µW/cm² Actinic UV 0.0139 µW/cm² (0.681 mW/klm) Exctincition Lumisterol 110 m²/mol Exctincition 7DHC 99.5 m²/mol Exctincition Toxisterols 41.3 m²/mol
Broadbandmeters
Solarmeter 6.2 (UVB, pre 2010) 0.562 µW/cm² Solarmeter 6.5 (UV-Index, pre 2010) 0.019 Leybold UVB 0.431 µW/cm² Leybold UVA 4.14 µW/cm² Leybold UVC 0.00141 µW/cm² DeltaOhm UVB 0.662 µW/cm² DeltaOhm UVC 0.0908 µW/cm² Vernier UVB 0.154 µW/cm² Vernier UVA 2.63 µW/cm² Gröbel UVA 4.88 µW/cm² Gröbel UVB 0.221 µW/cm² Gröbel UVC 0.00129 µW/cm² Luxmeter 210 lx Solarmeter 6.4 (D3) 0.0594 IU/min UVX-31 0.864 µW/cm² IL UVB 0.000222 µW/cm² IL UVA 5.56 µW/cm² Solarmeter 6.5 (UVI, post 2010) 0.0167 UV-Index Solarmeter 6.2 (UVB, post 2010) 0.321 µW/cm² (Solarmeter Ratio = 19.2) Solarmeter AlGaN 6.5 UVI sensor 0.315 UV Index GenUV 7.1 UV-Index 0.0174 UV-Index Solarmeter 10.0 (Global Power) (manuf.) 0.766 W/m² Solarmeter 4.0 (UVA) 0.0894 mW/cm² LS122 (manuf.) 0 W/m² ISM400 (first guess) 0.478 W/m² LS122 (assumption) 0.0216 W/m² ISM400_new 0.373 W/m² Solarmeter 10.0 (Global Power) (assumption) 0.708 W/m²