with Schott Borofloat 33 borosilicate glass 3.8mm thickness
Spectrum 364: BEX5 Edit
DeleteMeasurement
| Brand |
BLV http://www.blv-licht.de |
|---|---|
| Lamp Product |
HITlite HIT-DE 70W 10'000K |
| Lamp ID |
BEX5 (02/2009) |
| Spectrometer | USB2000+ |
| Ballast | - no ballast or default/unknown ballast - |
| Reflector | |
| Distance | 10 cm |
| Age | 0 hours |
| Originator (measurement) | Frances Baines |
Database entry created:
Sarina Wunderlich
31/Jan/2011 ; updated:
Sarina Wunderlich
27/Feb/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 | ( 0.26 ; 0.23 ) | ( 0.19 ; 0.39 ) | ( 0.12 ; 0.16 ; 0.35 ) |
| CCT | 51000 Kelvin | 21000 Kelvin | 36000 Kelvin |
| distance | 0.081 | 0.071 | |
| 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) 5550 µW/cm² = 55.5 W/m² UVC ( 0 nm - 280 nm) 5.93 µW/cm² = 0.0593 W/m² non-terrestrial ( 0 nm - 290 nm) 9.14 µW/cm² = 0.0914 W/m² total2 ( 250 nm - 880 nm) 5550 µW/cm² = 55.5 W/m² UVB (EU) ( 280 nm - 315 nm) 71.1 µW/cm² = 0.711 W/m² UVB (US) ( 280 nm - 320 nm) 85.4 µW/cm² = 0.854 W/m² UVA+B ( 280 nm - 380 nm) 887 µW/cm² = 8.87 W/m² Solar UVB ( 290 nm - 315 nm) 67.9 µW/cm² = 0.679 W/m² UVA D3 regulating ( 315 nm - 335 nm) 67.6 µW/cm² = 0.676 W/m² UVA (EU) ( 315 nm - 380 nm) 816 µW/cm² = 8.16 W/m² UVA2 (medical definition) ( 320 nm - 340 nm) 82.8 µW/cm² = 0.828 W/m² UVA (US) ( 320 nm - 380 nm) 802 µW/cm² = 8.02 W/m² UVA1 (variant) ( 335 nm - 380 nm) 748 µW/cm² = 7.48 W/m² UVA1 (medical) ( 340 nm - 400 nm) 1200 µW/cm² = 12 W/m² vis. UVA ( 350 nm - 380 nm) 642 µW/cm² = 6.42 W/m² VIS Rep3 ( 350 nm - 600 nm) 4250 µW/cm² = 42.5 W/m² VIS Rep4 ( 350 nm - 700 nm) 4840 µW/cm² = 48.4 W/m² purple ( 380 nm - 420 nm) 1110 µW/cm² = 11.1 W/m² VIS ( 380 nm - 780 nm) 4480 µW/cm² = 44.8 W/m² VIS2 ( 400 nm - 680 nm) 3580 µW/cm² = 35.8 W/m² PAR ( 400 nm - 700 nm) 3720 µW/cm² = 37.2 W/m² tmp ( 400 nm - 1100 nm) 4170 µW/cm² = 41.7 W/m² blue ( 420 nm - 490 nm) 1440 µW/cm² = 14.4 W/m² green ( 490 nm - 575 nm) 820 µW/cm² = 8.2 W/m² yellow ( 575 nm - 585 nm) 128 µW/cm² = 1.28 W/m² orange ( 585 nm - 650 nm) 412 µW/cm² = 4.12 W/m² red ( 650 nm - 780 nm) 567 µW/cm² = 5.67 W/m² IRA ( 700 nm - 1400 nm) 459 µW/cm² = 4.59 W/m² IR2 ( 720 nm - 1100 nm) 396 µW/cm² = 3.96 W/m² IRB ( 1400 nm - 3000 nm) 0 µW/cm² = 0 W/m²
Actionspectra
Erythema 10.5 UV-Index Pyrimidine dimerization of DNA 35.8 µW/cm² Photoceratitis 14 µW/cm² Photoconjunctivitis 5.9 µW/cm² DNA Damage 7.89 Vitamin D3 27.2 µW/cm² Photosynthesis 2830 µW/cm² Luminosity 7310 lx Human L-Cone 1060 µW/cm² Human M-Cone 966 µW/cm² Human S-Cone 1270 µW/cm² CIE X 1090 µW/cm² CIE Y 997 µW/cm² CIE Z 2170 µW/cm² PAR 17000000 mol photons Extinction preD3 178 e-3*m²/mol Extinction Tachysterol 558 e-3*m²/mol Exctincition PreD3 119000 m²/mol Extinction Lumisterol 96.9 m²/mol Exctincition Tachysterol 746000 m²/mol Extinction 7DHC 116 m²/mol L-Cone 853 µW/cm² M-Cone 1160 µW/cm² S-Cone 2450 µW/cm² U-Cone 2590 µW/cm² UVR - ICNIRP 2004 13.8 Rel Biol Eff Melatonin Supression 1670 µW/cm² Blue Light Hazard 1610 µW/cm² (220 µW/cm² per 1000 lx) CIE 174:2006 PreVit D3 28.7 µW/cm² Lumen Reptil 14000 "pseudo-lx" Vitamin D3 Degradation 20.8 µW/cm² Actinic UV 13.6 µW/cm² (18.6 mW/klm) Exctincition Lumisterol 111000 m²/mol Exctincition 7DHC 130000 m²/mol Exctincition Toxisterols 32600 m²/mol
Broadbandmeters
Solarmeter 6.2 (UVB, pre 2010) 107 µW/cm² Solarmeter 6.5 (UV-Index, pre 2010) 8.41 Leybold UVB 70.9 µW/cm² Leybold UVA 608 µW/cm² Leybold UVC 4.43 µW/cm² DeltaOhm UVB 129 µW/cm² DeltaOhm UVC 22.4 µW/cm² Vernier UVB 33.1 µW/cm² Vernier UVA 372 µW/cm² Gröbel UVA 666 µW/cm² Gröbel UVB 47.9 µW/cm² Gröbel UVC 4.78 µW/cm² Luxmeter 7620 lx Solarmeter 6.4 (D3) 26.3 IU/min UVX-31 166 µW/cm² IL UVB 0.0467 µW/cm² IL UVA 756 µW/cm² Solarmeter 6.5 (UVI, post 2010) 6.03 UV-Index Solarmeter 6.2 (UVB, post 2010) 57.1 µW/cm² (Solarmeter Ratio = 9.46) Solarmeter AlGaN 6.5 UVI sensor 55.7 UV Index GenUV 7.1 UV-Index 3.25 UV-Index Solarmeter 10.0 (Global Power) (manuf.) 47.4 W/m² Solarmeter 4.0 (UVA) 13.2 mW/cm² LS122 (manuf.) 0.0916 W/m² ISM400 (first guess) 30.3 W/m² LS122 (assumption) 1.23 W/m² ISM400_new 25.7 W/m² Solarmeter 10.0 (Global Power) (assumption) 41.2 W/m²