5000 Kelvin
Spectrum 130: SW-BB5000 Edit
DeleteMeasurement
| Brand |
other other |
|---|---|
| Lamp Product |
Black Body Radiation Black Body Radiation I(lambda in meters) prop.to 1/lambda^5/(exp(0.014388/lambda/KELVIN)-1) |
| Lamp ID |
SW-BB5000 (03/2010) |
| Spectrometer | - |
| Ballast | - no ballast or default/unknown ballast - |
| Reflector | |
| Distance | 0 cm |
| Age | 0 hours |
| Originator (measurement) | Sarina Wunderlich |
Database entry created:
Sarina Wunderlich
12/Mar/2010 ; updated:
Sarina Wunderlich
5/May/2021
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 | ( 0.35 ; 0.35 ) | ( 0.39 ; 0.34 ) | ( 0.29 ; 0.28 ; 0.24 ) |
| CCT | 5000 Kelvin | 5000 Kelvin | 5000 Kelvin |
| distance | 5.4E-5 | 9.4E-5 | |
| 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) 283000 µW/cm² = 2830 W/m² UVC ( 0 nm - 280 nm) 2190 µW/cm² = 21.9 W/m² non-terrestrial ( 0 nm - 290 nm) 2850 µW/cm² = 28.5 W/m² total2 ( 250 nm - 880 nm) 154000 µW/cm² = 1540 W/m² UVB (EU) ( 280 nm - 315 nm) 2830 µW/cm² = 28.3 W/m² UVB (US) ( 280 nm - 320 nm) 3360 µW/cm² = 33.6 W/m² UVA+B ( 280 nm - 380 nm) 12500 µW/cm² = 125 W/m² Solar UVB ( 290 nm - 315 nm) 2180 µW/cm² = 21.8 W/m² UVA D3 regulating ( 315 nm - 335 nm) 2350 µW/cm² = 23.5 W/m² UVA (EU) ( 315 nm - 380 nm) 9670 µW/cm² = 96.7 W/m² UVA2 (medical definition) ( 320 nm - 340 nm) 2490 µW/cm² = 24.9 W/m² UVA (US) ( 320 nm - 380 nm) 9140 µW/cm² = 91.4 W/m² UVA1 (variant) ( 335 nm - 380 nm) 7330 µW/cm² = 73.3 W/m² UVA1 (medical) ( 340 nm - 400 nm) 10800 µW/cm² = 108 W/m² vis. UVA ( 350 nm - 380 nm) 5200 µW/cm² = 52 W/m² VIS Rep3 ( 350 nm - 600 nm) 67700 µW/cm² = 677 W/m² VIS Rep4 ( 350 nm - 700 nm) 98800 µW/cm² = 988 W/m² purple ( 380 nm - 420 nm) 8740 µW/cm² = 87.4 W/m² VIS ( 380 nm - 780 nm) 116000 µW/cm² = 1160 W/m² VIS2 ( 400 nm - 680 nm) 83400 µW/cm² = 834 W/m² PAR ( 400 nm - 700 nm) 89400 µW/cm² = 894 W/m² tmp ( 400 nm - 1100 nm) 177000 µW/cm² = 1770 W/m² blue ( 420 nm - 490 nm) 19100 µW/cm² = 191 W/m² green ( 490 nm - 575 nm) 26600 µW/cm² = 266 W/m² yellow ( 575 nm - 585 nm) 3210 µW/cm² = 32.1 W/m² orange ( 585 nm - 650 nm) 20600 µW/cm² = 206 W/m² red ( 650 nm - 780 nm) 37700 µW/cm² = 377 W/m² IRA ( 700 nm - 1400 nm) 120000 µW/cm² = 1200 W/m² IR2 ( 720 nm - 1100 nm) 81400 µW/cm² = 814 W/m² IRB ( 1400 nm - 3000 nm) 45600 µW/cm² = 456 W/m²
Actionspectra
Erythema 1200 UV-Index Pyrimidine dimerization of DNA 1450 µW/cm² Photoceratitis 1530 µW/cm² Photoconjunctivitis 1620 µW/cm² DNA Damage 2180 Vitamin D3 2020 µW/cm² Photosynthesis 63300 µW/cm² Luminosity 243000 lx Human L-Cone 36600 µW/cm² Human M-Cone 29700 µW/cm² Human S-Cone 15700 µW/cm² CIE X 33100 µW/cm² CIE Y 33700 µW/cm² CIE Z 29000 µW/cm² PAR 426000000 mol photons Extinction preD3 23400 e-3*m²/mol Extinction Tachysterol 58000 e-3*m²/mol Exctincition PreD3 19500000 m²/mol Extinction Lumisterol 18100 m²/mol Exctincition Tachysterol 72500000 m²/mol Extinction 7DHC 21500 m²/mol L-Cone 31700 µW/cm² M-Cone 30100 µW/cm² S-Cone 26000 µW/cm² U-Cone 20100 µW/cm² UVR - ICNIRP 2004 2220 Rel Biol Eff Melatonin Supression 24200 µW/cm² Blue Light Hazard 18200 µW/cm² (75 µW/cm² per 1000 lx) CIE 174:2006 PreVit D3 2060 µW/cm² Lumen Reptil 249000 "pseudo-lx" Vitamin D3 Degradation 1540 µW/cm² Actinic UV 2220 µW/cm² (91.3 mW/klm) Exctincition Lumisterol 19100000 m²/mol Exctincition 7DHC 22800000 m²/mol Exctincition Toxisterols 8840000 m²/mol
Broadbandmeters
Solarmeter 6.2 (UVB, pre 2010) 5930 µW/cm² Solarmeter 6.5 (UV-Index, pre 2010) 747 Leybold UVB 2530 µW/cm² Leybold UVA 6850 µW/cm² Leybold UVC 1200 µW/cm² DeltaOhm UVB 4430 µW/cm² DeltaOhm UVC 2230 µW/cm² Vernier UVB 2000 µW/cm² Vernier UVA 6420 µW/cm² Gröbel UVA 7990 µW/cm² Gröbel UVB 2690 µW/cm² Gröbel UVC 1360 µW/cm² Luxmeter 244000 lx Solarmeter 6.4 (D3) 2340 IU/min UVX-31 4950 µW/cm² IL UVB 2.49 µW/cm² IL UVA 8070 µW/cm² Solarmeter 6.5 (UVI, post 2010) 489 UV-Index Solarmeter 6.2 (UVB, post 2010) 2550 µW/cm² (Solarmeter Ratio = 5.21) Solarmeter AlGaN 6.5 UVI sensor 2810 UV Index GenUV 7.1 UV-Index 192 UV-Index Solarmeter 10.0 (Global Power) (manuf.) 2450 W/m² Solarmeter 4.0 (UVA) 132 mW/cm² LS122 (manuf.) 1290 W/m² ISM400 (first guess) 2520 W/m² LS122 (assumption) 1220 W/m² ISM400_new 2760 W/m² Solarmeter 10.0 (Global Power) (assumption) 2440 W/m²