Spectrum 535: SW-295 Edit
DeleteMeasurement
| Brand |
other other |
|---|---|
| Lamp Product |
295 nm narrow band |
| Lamp ID |
SW-295 (01/2017) 295 nm narrow band radiation |
| Spectrometer | - |
| Ballast | - no ballast or default/unknown ballast - |
| Reflector | |
| Distance | 0 cm |
| Age | 0 hours |
| Originator (measurement) | Publication |
Database entry created:
Sarina Wunderlich
5/Jan/2017 ; updated:
Sarina Wunderlich
5/Jan/2017
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.
WARNING: The measurement range (350 - 800 nm) is not sufficient for this evaluation! Data is only available in the range 280 - 315 nm. Results are shown anyway but should be ignored by anyone except experts.
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 | ( NAN ; NAN ) | ( NAN ; NAN ) | ( NAN ; NAN ; NAN ) |
| CCT | 0 Kelvin | NAN Kelvin | NAN Kelvin |
| distance | NAN | NAN | |
| 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) 1000 µW/cm² = 10 W/m² UVC ( 0 nm - 280 nm) 0 µW/cm² = 0 W/m² non-terrestrial ( 0 nm - 290 nm) 104 µW/cm² = 1.04 W/m² total2 ( 250 nm - 880 nm) 1000 µW/cm² = 10 W/m² UVB (EU) ( 280 nm - 315 nm) 1000 µW/cm² = 10 W/m² UVB (US) ( 280 nm - 320 nm) 1000 µW/cm² = 10 W/m² UVA+B ( 280 nm - 380 nm) 1000 µW/cm² = 10 W/m² Solar UVB ( 290 nm - 315 nm) 896 µW/cm² = 8.96 W/m² UVA D3 regulating ( 315 nm - 335 nm) 0 µW/cm² = 0 W/m² UVA (EU) ( 315 nm - 380 nm) 0 µW/cm² = 0 W/m² UVA2 (medical definition) ( 320 nm - 340 nm) 0 µW/cm² = 0 W/m² UVA (US) ( 320 nm - 380 nm) 0 µW/cm² = 0 W/m² UVA1 (variant) ( 335 nm - 380 nm) 0 µW/cm² = 0 W/m² UVA1 (medical) ( 340 nm - 400 nm) 0 µW/cm² = 0 W/m² vis. UVA ( 350 nm - 380 nm) 0 µW/cm² = 0 W/m² VIS Rep3 ( 350 nm - 600 nm) 0 µW/cm² = 0 W/m² VIS Rep4 ( 350 nm - 700 nm) 0 µW/cm² = 0 W/m² purple ( 380 nm - 420 nm) 0 µW/cm² = 0 W/m² VIS ( 380 nm - 780 nm) 0 µW/cm² = 0 W/m² PAR ( 400 nm - 700 nm) 0 µW/cm² = 0 W/m² blue ( 420 nm - 490 nm) 0 µW/cm² = 0 W/m² green ( 490 nm - 575 nm) 0 µW/cm² = 0 W/m² yellow ( 575 nm - 585 nm) 0 µW/cm² = 0 W/m² orange ( 585 nm - 650 nm) 0 µW/cm² = 0 W/m² red ( 650 nm - 780 nm) 0 µW/cm² = 0 W/m² IRA ( 700 nm - 1400 nm) 0 µW/cm² = 0 W/m² IRB ( 1400 nm - 3000 nm) 0 µW/cm² = 0 W/m²
Actionspectra
Erythema 365 UV-Index Pyrimidine dimerization of DNA 425 µW/cm² Photoceratitis 593 µW/cm² Photoconjunctivitis 39.7 µW/cm² DNA Damage 133 Vitamin D3 953 µW/cm² Photosynthesis 0 µW/cm² Luminosity 0 lx Human L-Cone 0 µW/cm² Human M-Cone 0 µW/cm² Human S-Cone 0 µW/cm² CIE X 0 µW/cm² CIE Y 0 µW/cm² CIE Z 0 µW/cm² PAR 0 mol photons Extinction preD3 3530 e-3*m²/mol Extinction Tachysterol 14600 e-3*m²/mol Exctincition PreD3 2270000 m²/mol Extinction Lumisterol 3100 m²/mol Exctincition Tachysterol 18900000 m²/mol Extinction 7DHC 4520 m²/mol L-Cone 0 µW/cm² M-Cone 0 µW/cm² S-Cone 0 µW/cm² U-Cone 0 µW/cm² UVR - ICNIRP 2004 505 Rel Biol Eff Melatonin Supression 0 µW/cm² Blue Light Hazard 1.04 µW/cm² (NAN µW/cm² per 1000 lx) CIE 174:2006 PreVit D3 949 µW/cm² Lumen Reptil 0 "pseudo-lx" Vitamin D3 Degradation 414 µW/cm² Actinic UV 505 µW/cm² (NAN mW/klm) Exctincition Lumisterol 3670000 m²/mol Exctincition 7DHC 5280000 m²/mol Exctincition Toxisterols 150000 m²/mol
Broadbandmeters
Solarmeter 6.2 (UVB, pre 2010) 1390 µW/cm² Solarmeter 6.5 (UV-Index, pre 2010) 292 Leybold UVB 763 µW/cm² Leybold UVA 0 µW/cm² Leybold UVC 4.15 µW/cm² DeltaOhm UVB 737 µW/cm² DeltaOhm UVC 233 µW/cm² Vernier UVB 813 µW/cm² Vernier UVA 2.16 µW/cm² Gröbel UVA 5.34 µW/cm² Gröbel UVB 982 µW/cm² Gröbel UVC 3.49 µW/cm² Solarmeter 6.4 (D3) 914 IU/min UVX-31 714 µW/cm² IL UVB 0.726 µW/cm² IL UVA 0 µW/cm² Solarmeter 6.5 (UVI, post 2010) 165 UV-Index Solarmeter 6.2 (UVB, post 2010) 503 µW/cm² (Solarmeter Ratio = 3.05) Solarmeter AlGaN 6.5 UVI sensor 877 UV Index GenUV 7.1 UV-Index 44.8 UV-Index Solarmeter 10.0 (Global Power) 3 W/m² Solarmeter 4.0 (UVA) 0.0226 mW/cm² LS122 0 W/m² ISM400 0 W/m²