Spectrum 420: SW-FT1 Edit
DeleteMeasurement
| Brand |
Osram Osram GmbH http://www.osram.de/ |
|---|---|
| Lamp Product |
Lumilux |
| Lamp ID |
SW-FT1 (01/2011) Lab Lamp, 840 |
| Spectrometer | QE65000 |
| Ballast | - no ballast or default/unknown ballast - |
| Reflector | |
| Distance | 0 cm |
| Age | 0 hours |
| Originator (measurement) | Sarina Wunderlich |
Database entry created:
Sarina Wunderlich
28/Dec/2011 ; updated:
Sarina Wunderlich
25/Jul/2023
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 | ( 0.38 ; 0.41 ) | ( 0.51 ; 0.41 ) | ( 0.47 ; 0.27 ; 0.22 ) |
| CCT | 4100 Kelvin | 3700 Kelvin | 3200 Kelvin |
| distance | 0.091 | 0.058 | |
| 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) 1300000 µW/cm² = 13000 W/m² UVC ( 0 nm - 280 nm) 329 µW/cm² = 3.29 W/m² non-terrestrial ( 0 nm - 290 nm) 374 µW/cm² = 3.74 W/m² total2 ( 250 nm - 880 nm) 1300000 µW/cm² = 13000 W/m² UVB (EU) ( 280 nm - 315 nm) 201 µW/cm² = 2.01 W/m² UVB (US) ( 280 nm - 320 nm) 241 µW/cm² = 2.41 W/m² UVA+B ( 280 nm - 380 nm) 5050 µW/cm² = 50.5 W/m² Solar UVB ( 290 nm - 315 nm) 156 µW/cm² = 1.56 W/m² UVA D3 regulating ( 315 nm - 335 nm) 257 µW/cm² = 2.57 W/m² UVA (EU) ( 315 nm - 380 nm) 4850 µW/cm² = 48.5 W/m² UVA2 (medical definition) ( 320 nm - 340 nm) 321 µW/cm² = 3.21 W/m² UVA (US) ( 320 nm - 380 nm) 4810 µW/cm² = 48.1 W/m² UVA1 (variant) ( 335 nm - 380 nm) 4590 µW/cm² = 45.9 W/m² UVA1 (medical) ( 340 nm - 400 nm) 9620 µW/cm² = 96.2 W/m² vis. UVA ( 350 nm - 380 nm) 4130 µW/cm² = 41.3 W/m² VIS Rep3 ( 350 nm - 600 nm) 896000 µW/cm² = 8960 W/m² VIS Rep4 ( 350 nm - 700 nm) 1270000 µW/cm² = 12700 W/m² purple ( 380 nm - 420 nm) 33000 µW/cm² = 330 W/m² VIS ( 380 nm - 780 nm) 1290000 µW/cm² = 12900 W/m² VIS2 ( 400 nm - 680 nm) 1250000 µW/cm² = 12500 W/m² PAR ( 400 nm - 700 nm) 1260000 µW/cm² = 12600 W/m² tmp ( 400 nm - 1100 nm) 1290000 µW/cm² = 12900 W/m² blue ( 420 nm - 490 nm) 252000 µW/cm² = 2520 W/m² green ( 490 nm - 575 nm) 473000 µW/cm² = 4730 W/m² yellow ( 575 nm - 585 nm) 62500 µW/cm² = 625 W/m² orange ( 585 nm - 650 nm) 418000 µW/cm² = 4180 W/m² red ( 650 nm - 780 nm) 54900 µW/cm² = 549 W/m² IRA ( 700 nm - 1400 nm) 24400 µW/cm² = 244 W/m² IR2 ( 720 nm - 1100 nm) 3810 µW/cm² = 38.1 W/m² IRB ( 1400 nm - 3000 nm) 0 µW/cm² = 0 W/m²
Actionspectra
Erythema 103 UV-Index Pyrimidine dimerization of DNA 102 µW/cm² Photoceratitis 124 µW/cm² Photoconjunctivitis 194 µW/cm² DNA Damage 265 Vitamin D3 145 µW/cm² Photosynthesis 783000 µW/cm² Luminosity 5050000 lx Human L-Cone 766000 µW/cm² Human M-Cone 607000 µW/cm² Human S-Cone 184000 µW/cm² CIE X 659000 µW/cm² CIE Y 708000 µW/cm² CIE Z 346000 µW/cm² PAR 5920000000 mol photons Extinction preD3 2520 e-3*m²/mol Extinction Tachysterol 5250 e-3*m²/mol Exctincition PreD3 1970000 m²/mol Extinction Lumisterol 1850 m²/mol Exctincition Tachysterol 6330000 m²/mol Extinction 7DHC 2030 m²/mol L-Cone 651000 µW/cm² M-Cone 384000 µW/cm² S-Cone 308000 µW/cm² U-Cone 55100 µW/cm² UVR - ICNIRP 2004 212 Rel Biol Eff Melatonin Supression 271000 µW/cm² Blue Light Hazard 211000 µW/cm² (41.8 µW/cm² per 1000 lx) CIE 174:2006 PreVit D3 148 µW/cm² Lumen Reptil 3710000 "pseudo-lx" Vitamin D3 Degradation 120 µW/cm² Actinic UV 211 µW/cm² (0.418 mW/klm) Exctincition Lumisterol 1750000 m²/mol Exctincition 7DHC 2040000 m²/mol Exctincition Toxisterols 1080000 m²/mol
Broadbandmeters
Solarmeter 6.2 (UVB, pre 2010) 510 µW/cm² Solarmeter 6.5 (UV-Index, pre 2010) 55.6 Leybold UVB 184 µW/cm² Leybold UVA 3730 µW/cm² Leybold UVC 143 µW/cm² DeltaOhm UVB 419 µW/cm² DeltaOhm UVC 245 µW/cm² Vernier UVB 131 µW/cm² Vernier UVA 1970 µW/cm² Gröbel UVA 3990 µW/cm² Gröbel UVB 201 µW/cm² Gröbel UVC 163 µW/cm² Luxmeter 5120000 lx Solarmeter 6.4 (D3) 174 IU/min UVX-31 615 µW/cm² IL UVB 0.214 µW/cm² IL UVA 4570 µW/cm² Solarmeter 6.5 (UVI, post 2010) 38.6 UV-Index Solarmeter 6.2 (UVB, post 2010) 208 µW/cm² (Solarmeter Ratio = 5.38) Solarmeter AlGaN 6.5 UVI sensor 209 UV Index GenUV 7.1 UV-Index 17.5 UV-Index Solarmeter 10.0 (Global Power) (manuf.) 14000 W/m² Solarmeter 4.0 (UVA) 121 mW/cm² LS122 (manuf.) 2.76 W/m² ISM400 (first guess) 9880 W/m² LS122 (assumption) 566 W/m² ISM400_new 7900 W/m² Solarmeter 10.0 (Global Power) (assumption) 13900 W/m²