Spectrum taken from the picture on the package, offset subtracted
Spectrum 62: SW-M-10 Edit
DeleteMeasurement
| Brand |
Lucky Reptile Import Export Peter Hoch http://www.hoch-rep.com/ |
|---|---|
| Lamp Product |
Bright Sun FLOOD Desert 70W PAR38 70° |
| Lamp ID |
SW-M-10 (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 | ( 0.33 ; 0.31 ) | ( 0.16 ; 0.29 ) | ( 0.17 ; 0.13 ; 0.24 ) |
| CCT | 5700 Kelvin | 0 Kelvin | 21000 Kelvin |
| distance | 0 | 0.086 | |
| 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) 22300 µW/cm² = 223 W/m² UVC ( 0 nm - 280 nm) 0 µW/cm² = 0 W/m² non-terrestrial ( 0 nm - 290 nm) 60.3 µW/cm² = 0.603 W/m² total2 ( 250 nm - 880 nm) 22300 µW/cm² = 223 W/m² UVB (EU) ( 280 nm - 315 nm) 281 µW/cm² = 2.81 W/m² UVB (US) ( 280 nm - 320 nm) 349 µW/cm² = 3.49 W/m² UVA+B ( 280 nm - 380 nm) 6100 µW/cm² = 61 W/m² Solar UVB ( 290 nm - 315 nm) 220 µW/cm² = 2.2 W/m² UVA D3 regulating ( 315 nm - 335 nm) 375 µW/cm² = 3.75 W/m² UVA (EU) ( 315 nm - 380 nm) 5810 µW/cm² = 58.1 W/m² UVA2 (medical definition) ( 320 nm - 340 nm) 491 µW/cm² = 4.91 W/m² UVA (US) ( 320 nm - 380 nm) 5750 µW/cm² = 57.5 W/m² UVA1 (variant) ( 335 nm - 380 nm) 5440 µW/cm² = 54.4 W/m² UVA1 (medical) ( 340 nm - 400 nm) 7100 µW/cm² = 71 W/m² vis. UVA ( 350 nm - 380 nm) 4730 µW/cm² = 47.3 W/m² VIS Rep3 ( 350 nm - 600 nm) 17000 µW/cm² = 170 W/m² VIS Rep4 ( 350 nm - 700 nm) 19900 µW/cm² = 199 W/m² purple ( 380 nm - 420 nm) 3670 µW/cm² = 36.7 W/m² VIS ( 380 nm - 780 nm) 16000 µW/cm² = 160 W/m² PAR ( 400 nm - 700 nm) 13400 µW/cm² = 134 W/m² blue ( 420 nm - 490 nm) 3730 µW/cm² = 37.3 W/m² green ( 490 nm - 575 nm) 3610 µW/cm² = 36.1 W/m² yellow ( 575 nm - 585 nm) 308 µW/cm² = 3.08 W/m² orange ( 585 nm - 650 nm) 2940 µW/cm² = 29.4 W/m² red ( 650 nm - 780 nm) 1720 µW/cm² = 17.2 W/m² IRA ( 700 nm - 1400 nm) 965 µW/cm² = 9.65 W/m² IRB ( 1400 nm - 3000 nm) 0 µW/cm² = 0 W/m²
Actionspectra
Erythema 53.5 UV-Index Pyrimidine dimerization of DNA 144 µW/cm² Photoceratitis 88.5 µW/cm² Photoconjunctivitis 14 µW/cm² DNA Damage 32.9 Vitamin D3 141 µW/cm² Photosynthesis 9410 µW/cm² Luminosity 36100 lx Human L-Cone 5440 µW/cm² Human M-Cone 4390 µW/cm² Human S-Cone 3370 µW/cm² CIE X 5240 µW/cm² CIE Y 4990 µW/cm² CIE Z 5750 µW/cm² PAR 63300000 mol photons Extinction preD3 774 e-3*m²/mol Extinction Tachysterol 2850 e-3*m²/mol Exctincition PreD3 509000 m²/mol Extinction Lumisterol 546 m²/mol Exctincition Tachysterol 3920000 m²/mol Extinction 7DHC 709 m²/mol L-Cone 4620 µW/cm² M-Cone 3580 µW/cm² S-Cone 6640 µW/cm² U-Cone 12500 µW/cm² UVR - ICNIRP 2004 77.5 Rel Biol Eff Melatonin Supression 4500 µW/cm² Blue Light Hazard 4270 µW/cm² (118 µW/cm² per 1000 lx) CIE 174:2006 PreVit D3 148 µW/cm² Lumen Reptil 53800 "pseudo-lx" Vitamin D3 Degradation 104 µW/cm² Actinic UV 77.1 µW/cm² (21.4 mW/klm) Exctincition Lumisterol 648000 m²/mol Exctincition 7DHC 826000 m²/mol Exctincition Toxisterols 50600 m²/mol
Broadbandmeters
Solarmeter 6.2 (UVB, pre 2010) 463 µW/cm² Solarmeter 6.5 (UV-Index, pre 2010) 48 Leybold UVB 266 µW/cm² Leybold UVA 4260 µW/cm² Leybold UVC 0.54 µW/cm² DeltaOhm UVB 602 µW/cm² DeltaOhm UVC 88.1 µW/cm² Vernier UVB 154 µW/cm² Vernier UVA 2450 µW/cm² Gröbel UVA 4780 µW/cm² Gröbel UVB 222 µW/cm² Gröbel UVC 4.07 µW/cm² Solarmeter 6.4 (D3) 150 IU/min UVX-31 851 µW/cm² IL UVB 0.227 µW/cm² IL UVA 5320 µW/cm² Solarmeter 6.5 (UVI, post 2010) 29.4 UV-Index Solarmeter 6.2 (UVB, post 2010) 235 µW/cm² (Solarmeter Ratio = 7.99) Solarmeter AlGaN 6.5 UVI sensor 235 UV Index GenUV 7.1 UV-Index 13.7 UV-Index Solarmeter 10.0 (Global Power) 183 W/m² Solarmeter 4.0 (UVA) 80.9 mW/cm² LS122 0 W/m² ISM400 109 W/m²