Spectrum taken from the picture on the package, offset subtracted
Spectrum 63: SW-M-11 Edit
DeleteMeasurement
| Brand |
Lucky Reptile Import Export Peter Hoch http://www.hoch-rep.com/ |
|---|---|
| Lamp Product |
Bright Sun FLOOD Jungle 70W PAR38 70° |
| Lamp ID |
SW-M-11 (11/2007) |
| Spectrometer | - |
| Ballast | - no ballast or default/unknown ballast - |
| Reflector | |
| Distance | 0 cm |
| Age | 0 hours |
| Originator (measurement) | Manufacturer |
Database entry created:
Sarina Wunderlich
4/Mar/2010 ; updated:
Sarina Wunderlich
9/Oct/2011
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 | ( 0.36 ; 0.37 ) | ( 0.22 ; 0.28 ) | ( 0.25 ; 0.17 ; 0.21 ) |
| CCT | 4700 Kelvin | 24000 Kelvin | 7300 Kelvin |
| distance | 0.035 | 0.1 | |
| 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) 16100 µW/cm² = 161 W/m² UVC ( 0 nm - 280 nm) 0 µW/cm² = 0 W/m² non-terrestrial ( 0 nm - 290 nm) 40.6 µW/cm² = 0.406 W/m² total2 ( 250 nm - 880 nm) 16100 µW/cm² = 161 W/m² UVB (EU) ( 280 nm - 315 nm) 188 µW/cm² = 1.88 W/m² UVB (US) ( 280 nm - 320 nm) 237 µW/cm² = 2.37 W/m² UVA+B ( 280 nm - 380 nm) 3830 µW/cm² = 38.3 W/m² Solar UVB ( 290 nm - 315 nm) 147 µW/cm² = 1.47 W/m² UVA D3 regulating ( 315 nm - 335 nm) 311 µW/cm² = 3.11 W/m² UVA (EU) ( 315 nm - 380 nm) 3640 µW/cm² = 36.4 W/m² UVA2 (medical definition) ( 320 nm - 340 nm) 393 µW/cm² = 3.93 W/m² UVA (US) ( 320 nm - 380 nm) 3590 µW/cm² = 35.9 W/m² UVA1 (variant) ( 335 nm - 380 nm) 3330 µW/cm² = 33.3 W/m² UVA1 (medical) ( 340 nm - 400 nm) 3970 µW/cm² = 39.7 W/m² vis. UVA ( 350 nm - 380 nm) 2990 µW/cm² = 29.9 W/m² VIS Rep3 ( 350 nm - 600 nm) 12500 µW/cm² = 125 W/m² VIS Rep4 ( 350 nm - 700 nm) 14500 µW/cm² = 145 W/m² purple ( 380 nm - 420 nm) 2040 µW/cm² = 20.4 W/m² VIS ( 380 nm - 780 nm) 12100 µW/cm² = 121 W/m² PAR ( 400 nm - 700 nm) 10700 µW/cm² = 107 W/m² blue ( 420 nm - 490 nm) 2430 µW/cm² = 24.3 W/m² green ( 490 nm - 575 nm) 3360 µW/cm² = 33.6 W/m² yellow ( 575 nm - 585 nm) 632 µW/cm² = 6.32 W/m² orange ( 585 nm - 650 nm) 2600 µW/cm² = 26 W/m² red ( 650 nm - 780 nm) 1040 µW/cm² = 10.4 W/m² IRA ( 700 nm - 1400 nm) 730 µW/cm² = 7.3 W/m² IRB ( 1400 nm - 3000 nm) 0 µW/cm² = 0 W/m²
Actionspectra
Erythema 29.7 UV-Index Pyrimidine dimerization of DNA 89.6 µW/cm² Photoceratitis 49.3 µW/cm² Photoconjunctivitis 9.82 µW/cm² DNA Damage 21.7 Vitamin D3 75.2 µW/cm² Photosynthesis 7090 µW/cm² Luminosity 35200 lx Human L-Cone 5310 µW/cm² Human M-Cone 4270 µW/cm² Human S-Cone 2120 µW/cm² CIE X 4760 µW/cm² CIE Y 4900 µW/cm² CIE Z 3710 µW/cm² PAR 52500000 mol photons Extinction preD3 483 e-3*m²/mol Extinction Tachysterol 1750 e-3*m²/mol Exctincition PreD3 322000 m²/mol Extinction Lumisterol 332 m²/mol Exctincition Tachysterol 2430000 m²/mol Extinction 7DHC 434 m²/mol L-Cone 4570 µW/cm² M-Cone 3150 µW/cm² S-Cone 3990 µW/cm² U-Cone 6900 µW/cm² UVR - ICNIRP 2004 45 Rel Biol Eff Melatonin Supression 3100 µW/cm² Blue Light Hazard 2580 µW/cm² (73.3 µW/cm² per 1000 lx) CIE 174:2006 PreVit D3 79 µW/cm² Lumen Reptil 39600 "pseudo-lx" Vitamin D3 Degradation 68 µW/cm² Actinic UV 44.8 µW/cm² (12.7 mW/klm) Exctincition Lumisterol 396000 m²/mol Exctincition 7DHC 503000 m²/mol Exctincition Toxisterols 32800 m²/mol
Broadbandmeters
Solarmeter 6.2 (UVB, pre 2010) 306 µW/cm² Solarmeter 6.5 (UV-Index, pre 2010) 26.9 Leybold UVB 180 µW/cm² Leybold UVA 2660 µW/cm² Leybold UVC 0.408 µW/cm² DeltaOhm UVB 439 µW/cm² DeltaOhm UVC 59.9 µW/cm² Vernier UVB 92.2 µW/cm² Vernier UVA 1600 µW/cm² Gröbel UVA 3090 µW/cm² Gröbel UVB 137 µW/cm² Gröbel UVC 3.24 µW/cm² Solarmeter 6.4 (D3) 84 IU/min UVX-31 591 µW/cm² IL UVB 0.148 µW/cm² IL UVA 3300 µW/cm² Solarmeter 6.5 (UVI, post 2010) 16.6 UV-Index Solarmeter 6.2 (UVB, post 2010) 165 µW/cm² (Solarmeter Ratio = 9.94) Solarmeter AlGaN 6.5 UVI sensor 152 UV Index GenUV 7.1 UV-Index 8.85 UV-Index Solarmeter 10.0 (Global Power) 141 W/m² Solarmeter 4.0 (UVA) 46.9 mW/cm² LS122 0 W/m² ISM400 88.7 W/m²