Spectrum 120: BLR5 Edit
DeleteMeasurement
| Brand |
Lucky Reptile Import Export Peter Hoch http://www.hoch-rep.com/ https://lucky-reptile.de/ |
|---|---|
| Lamp Product |
Bright Sun UV Jungle 70W PAR38 30° |
| Lamp ID |
BLR5 (07/2008) |
| Spectrometer | USB 2000 |
| Ballast | - no ballast or default/unknown ballast - |
| Reflector | |
| Distance | 30 cm |
| Age | 105 hours |
| Originator (measurement) | Frances Baines |
Database entry created:
Sarina Wunderlich
8/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 | ( 0.37 ; 0.36 ) | ( 0.21 ; 0.35 ) | ( 0.28 ; 0.15 ; 0.25 ) |
| CCT | 4300 Kelvin | 18000 Kelvin | 6200 Kelvin |
| distance | 0.032 | 0.12 | |
| 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) 21600 µW/cm² = 216 W/m² UVC ( 0 nm - 280 nm) 0 µW/cm² = 0 W/m² non-terrestrial ( 0 nm - 290 nm) 0 µW/cm² = 0 W/m² total2 ( 250 nm - 880 nm) 21600 µW/cm² = 216 W/m² UVB (EU) ( 280 nm - 315 nm) 215 µW/cm² = 2.15 W/m² UVB (US) ( 280 nm - 320 nm) 246 µW/cm² = 2.46 W/m² UVA+B ( 280 nm - 380 nm) 3130 µW/cm² = 31.3 W/m² Solar UVB ( 290 nm - 315 nm) 215 µW/cm² = 2.15 W/m² UVA D3 regulating ( 315 nm - 335 nm) 268 µW/cm² = 2.68 W/m² UVA (EU) ( 315 nm - 380 nm) 2920 µW/cm² = 29.2 W/m² UVA2 (medical definition) ( 320 nm - 340 nm) 365 µW/cm² = 3.65 W/m² UVA (US) ( 320 nm - 380 nm) 2890 µW/cm² = 28.9 W/m² UVA1 (variant) ( 335 nm - 380 nm) 2650 µW/cm² = 26.5 W/m² UVA1 (medical) ( 340 nm - 400 nm) 3760 µW/cm² = 37.6 W/m² vis. UVA ( 350 nm - 380 nm) 2340 µW/cm² = 23.4 W/m² VIS Rep3 ( 350 nm - 600 nm) 17200 µW/cm² = 172 W/m² VIS Rep4 ( 350 nm - 700 nm) 19200 µW/cm² = 192 W/m² purple ( 380 nm - 420 nm) 3050 µW/cm² = 30.5 W/m² VIS ( 380 nm - 780 nm) 17300 µW/cm² = 173 W/m² VIS2 ( 400 nm - 680 nm) 15400 µW/cm² = 154 W/m² PAR ( 400 nm - 700 nm) 15600 µW/cm² = 156 W/m² tmp ( 400 nm - 1100 nm) 17200 µW/cm² = 172 W/m² blue ( 420 nm - 490 nm) 3570 µW/cm² = 35.7 W/m² green ( 490 nm - 575 nm) 4400 µW/cm² = 44 W/m² yellow ( 575 nm - 585 nm) 880 µW/cm² = 8.8 W/m² orange ( 585 nm - 650 nm) 4380 µW/cm² = 43.8 W/m² red ( 650 nm - 780 nm) 1040 µW/cm² = 10.4 W/m² IRA ( 700 nm - 1400 nm) 1590 µW/cm² = 15.9 W/m² IR2 ( 720 nm - 1100 nm) 1450 µW/cm² = 14.5 W/m² IRB ( 1400 nm - 3000 nm) 0 µW/cm² = 0 W/m²
Actionspectra
Erythema 11.1 UV-Index Pyrimidine dimerization of DNA 95.8 µW/cm² Photoceratitis 17.9 µW/cm² Photoconjunctivitis 0.263 µW/cm² DNA Damage 1.01 Vitamin D3 45.7 µW/cm² Photosynthesis 10200 µW/cm² Luminosity 53100 lx Human L-Cone 8100 µW/cm² Human M-Cone 6280 µW/cm² Human S-Cone 3250 µW/cm² CIE X 7570 µW/cm² CIE Y 7380 µW/cm² CIE Z 5710 µW/cm² PAR 77400000 mol photons Extinction preD3 273 e-3*m²/mol Extinction Tachysterol 943 e-3*m²/mol Exctincition PreD3 132000 m²/mol Extinction Lumisterol 43.4 m²/mol Exctincition Tachysterol 1360000 m²/mol Extinction 7DHC 40.1 m²/mol L-Cone 7070 µW/cm² M-Cone 3820 µW/cm² S-Cone 6340 µW/cm² U-Cone 7850 µW/cm² UVR - ICNIRP 2004 9.11 Rel Biol Eff Melatonin Supression 4380 µW/cm² Blue Light Hazard 3870 µW/cm² (72.8 µW/cm² per 1000 lx) CIE 174:2006 PreVit D3 48.9 µW/cm² Lumen Reptil 55300 "pseudo-lx" Vitamin D3 Degradation 47.2 µW/cm² Actinic UV 8.86 µW/cm² (1.67 mW/klm) Exctincition Lumisterol 62700 m²/mol Exctincition 7DHC 53600 m²/mol Exctincition Toxisterols 21700 m²/mol
Broadbandmeters
Solarmeter 6.2 (UVB, pre 2010) 282 µW/cm² Solarmeter 6.5 (UV-Index, pre 2010) 12.7 Leybold UVB 213 µW/cm² Leybold UVA 2180 µW/cm² Leybold UVC 0.016 µW/cm² DeltaOhm UVB 445 µW/cm² DeltaOhm UVC 52.1 µW/cm² Vernier UVB 76.5 µW/cm² Vernier UVA 1340 µW/cm² Gröbel UVA 2470 µW/cm² Gröbel UVB 116 µW/cm² Gröbel UVC -0.0884 µW/cm² Luxmeter 55000 lx Solarmeter 6.4 (D3) 39.8 IU/min UVX-31 578 µW/cm² IL UVB 0.126 µW/cm² IL UVA 2660 µW/cm² Solarmeter 6.5 (UVI, post 2010) 10.4 UV-Index Solarmeter 6.2 (UVB, post 2010) 170 µW/cm² (Solarmeter Ratio = 16.3) Solarmeter AlGaN 6.5 UVI sensor 151 UV Index GenUV 7.1 UV-Index 8.36 UV-Index Solarmeter 10.0 (Global Power) (manuf.) 203 W/m² Solarmeter 4.0 (UVA) 43.5 mW/cm² LS122 (manuf.) 1.46 W/m² ISM400 (first guess) 140 W/m² LS122 (assumption) 7.68 W/m² ISM400_new 119 W/m² Solarmeter 10.0 (Global Power) (assumption) 188 W/m²