Spectrum from jpg providet by manufacturer
Spectrum 475: SWG1 Edit
DeleteMeasurement
| Brand |
Gavita Holland horticultural lighting company http://www.gavita-holland.com |
|---|---|
| Lamp Product |
LUXIM STA 41.02 LiFi Plasma Lamp http://www.gavita-holland.com/index.php/products/gavita-power-line-high-performance-lighting/item/gavita-pro-300-lep-2.html |
| Lamp ID |
SWG1 (11/2012) |
| Spectrometer | - |
| Ballast | - no ballast or default/unknown ballast - |
| Reflector | |
| Distance | 0 cm |
| Age | 0 hours |
| Originator (measurement) | Manufacturer |
Database entry created:
Sarina Wunderlich
5/Nov/2012 ; updated:
Sarina Wunderlich
5/Nov/2012
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 | ( 0.34 ; 0.35 ) | ( 0.42 ; 0.38 ) | ( 0.31 ; 0.29 ; 0.26 ) |
| CCT | 5100 Kelvin | 4600 Kelvin | 4700 Kelvin |
| distance | 0.044 | 0.031 | |
| 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) 5670 µW/cm² = 56.7 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) 5670 µW/cm² = 56.7 W/m² UVB (EU) ( 280 nm - 315 nm) 3.79 µW/cm² = 0.0379 W/m² UVB (US) ( 280 nm - 320 nm) 7.31 µW/cm² = 0.0731 W/m² UVA+B ( 280 nm - 380 nm) 229 µW/cm² = 2.29 W/m² Solar UVB ( 290 nm - 315 nm) 3.79 µW/cm² = 0.0379 W/m² UVA D3 regulating ( 315 nm - 335 nm) 27.2 µW/cm² = 0.272 W/m² UVA (EU) ( 315 nm - 380 nm) 225 µW/cm² = 2.25 W/m² UVA2 (medical definition) ( 320 nm - 340 nm) 40 µW/cm² = 0.4 W/m² UVA (US) ( 320 nm - 380 nm) 221 µW/cm² = 2.21 W/m² UVA1 (variant) ( 335 nm - 380 nm) 198 µW/cm² = 1.98 W/m² UVA1 (medical) ( 340 nm - 400 nm) 357 µW/cm² = 3.57 W/m² vis. UVA ( 350 nm - 380 nm) 136 µW/cm² = 1.36 W/m² VIS Rep3 ( 350 nm - 600 nm) 3770 µW/cm² = 37.7 W/m² VIS Rep4 ( 350 nm - 700 nm) 5140 µW/cm² = 51.4 W/m² purple ( 380 nm - 420 nm) 448 µW/cm² = 4.48 W/m² VIS ( 380 nm - 780 nm) 5390 µW/cm² = 53.9 W/m² PAR ( 400 nm - 700 nm) 4830 µW/cm² = 48.3 W/m² blue ( 420 nm - 490 nm) 1120 µW/cm² = 11.2 W/m² green ( 490 nm - 575 nm) 1560 µW/cm² = 15.6 W/m² yellow ( 575 nm - 585 nm) 186 µW/cm² = 1.86 W/m² orange ( 585 nm - 650 nm) 1170 µW/cm² = 11.7 W/m² red ( 650 nm - 780 nm) 901 µW/cm² = 9.01 W/m² IRA ( 700 nm - 1400 nm) 438 µW/cm² = 4.38 W/m² IRB ( 1400 nm - 3000 nm) 0 µW/cm² = 0 W/m²
Actionspectra
Erythema 0.231 UV-Index Pyrimidine dimerization of DNA 2.82 µW/cm² Photoceratitis 0.281 µW/cm² Photoconjunctivitis 0.0029 µW/cm² DNA Damage 0.00824 Vitamin D3 0.822 µW/cm² Photosynthesis 3320 µW/cm² Luminosity 14200 lx Human L-Cone 2140 µW/cm² Human M-Cone 1740 µW/cm² Human S-Cone 940 µW/cm² CIE X 1930 µW/cm² CIE Y 1970 µW/cm² CIE Z 1740 µW/cm² PAR 22800000 mol photons Extinction preD3 7.68 e-3*m²/mol Extinction Tachysterol 28.2 e-3*m²/mol Exctincition PreD3 4750 m²/mol Extinction Lumisterol 0.466 m²/mol Exctincition Tachysterol 59800 m²/mol Extinction 7DHC 0.206 m²/mol L-Cone 1830 µW/cm² M-Cone 1720 µW/cm² S-Cone 1560 µW/cm² U-Cone 801 µW/cm² UVR - ICNIRP 2004 0.139 Rel Biol Eff Melatonin Supression 1430 µW/cm² Blue Light Hazard 1080 µW/cm² (75.9 µW/cm² per 1000 lx) CIE 174:2006 PreVit D3 0.921 µW/cm² Lumen Reptil 14000 "pseudo-lx" Vitamin D3 Degradation 1.59 µW/cm² Actinic UV 0.138 µW/cm² (0.0973 mW/klm) Exctincition Lumisterol 897 m²/mol Exctincition 7DHC 330 m²/mol Exctincition Toxisterols 1430 m²/mol
Broadbandmeters
Solarmeter 6.2 (UVB, pre 2010) 11.4 µW/cm² Solarmeter 6.5 (UV-Index, pre 2010) 0.266 Leybold UVB 7.03 µW/cm² Leybold UVA 187 µW/cm² Leybold UVC 0 µW/cm² DeltaOhm UVB 33.2 µW/cm² DeltaOhm UVC 2.47 µW/cm² Vernier UVB 1.81 µW/cm² Vernier UVA 119 µW/cm² Gröbel UVA 191 µW/cm² Gröbel UVB 3.63 µW/cm² Gröbel UVC -0.00179 µW/cm² Solarmeter 6.4 (D3) 0.831 IU/min UVX-31 45.9 µW/cm² IL UVB 0.00639 µW/cm² IL UVA 208 µW/cm² Solarmeter 6.5 (UVI, post 2010) 0.234 UV-Index Solarmeter 6.2 (UVB, post 2010) 7.78 µW/cm² (Solarmeter Ratio = 33.3) Solarmeter AlGaN 6.5 UVI sensor 3.55 UV Index GenUV 7.1 UV-Index 0.27 UV-Index Solarmeter 10.0 (Global Power) 59.7 W/m² Solarmeter 4.0 (UVA) 3.88 mW/cm² LS122 0 W/m² ISM400 44 W/m²