Spectrum 583: BZCU1 Edit
DeleteMeasurement
| Brand |
Zoo Med Zoo Med Laboratories, Inc http://www.zoomed.com/ |
|---|---|
| Lamp Product |
Reptisun UVB/LED 9W 60-LED UV-emitting LED bar. Specifications: 4 x UVB LED, 1 x UVA LED, 8 x 6500K LED. 9 watts, 283 lm, CRI 96, 6500K. Suggested distances (no screen) FZ4- 23-38cm; FZ3- 38-61cm; FZ2- 61-79cm; FZ1-79-102cm |
| Lamp ID |
BZCU1 (10/2021) |
| Spectrometer | USB2000+ (2) |
| Ballast | - no ballast or default/unknown ballast - |
| Reflector | |
| Distance | 20 cm |
| Age | 0.5 hours |
| Originator (measurement) | Frances Baines |
Database entry created:
Sarina Wunderlich
6/Oct/2021 ; updated:
Sarina Wunderlich
6/Oct/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 | ( 0.29 ; 0.28 ) | ( 0.28 ; 0.32 ) | ( 0.19 ; 0.23 ; 0.26 ) |
| CCT | 8800 Kelvin | 9100 Kelvin | 8300 Kelvin |
| distance | 0.016 | 0.019 | |
| 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) 480 µW/cm² = 4.8 W/m² UVC ( 0 nm - 280 nm) 0.0219 µW/cm² = 0.000219 W/m² non-terrestrial ( 0 nm - 290 nm) 0.0221 µW/cm² = 0.000221 W/m² total2 ( 250 nm - 880 nm) 480 µW/cm² = 4.8 W/m² UVB (EU) ( 280 nm - 315 nm) 22.6 µW/cm² = 0.226 W/m² UVB (US) ( 280 nm - 320 nm) 27 µW/cm² = 0.27 W/m² UVA+B ( 280 nm - 380 nm) 133 µW/cm² = 1.33 W/m² Solar UVB ( 290 nm - 315 nm) 22.6 µW/cm² = 0.226 W/m² UVA D3 regulating ( 315 nm - 335 nm) 9.14 µW/cm² = 0.0914 W/m² UVA (EU) ( 315 nm - 380 nm) 110 µW/cm² = 1.1 W/m² UVA2 (medical definition) ( 320 nm - 340 nm) 5.28 µW/cm² = 0.0528 W/m² UVA (US) ( 320 nm - 380 nm) 106 µW/cm² = 1.06 W/m² UVA1 (variant) ( 335 nm - 380 nm) 101 µW/cm² = 1.01 W/m² UVA1 (medical) ( 340 nm - 400 nm) 106 µW/cm² = 1.06 W/m² vis. UVA ( 350 nm - 380 nm) 100 µW/cm² = 1 W/m² VIS Rep3 ( 350 nm - 600 nm) 345 µW/cm² = 3.45 W/m² VIS Rep4 ( 350 nm - 700 nm) 434 µW/cm² = 4.34 W/m² purple ( 380 nm - 420 nm) 5.95 µW/cm² = 0.0595 W/m² VIS ( 380 nm - 780 nm) 347 µW/cm² = 3.47 W/m² VIS2 ( 400 nm - 680 nm) 319 µW/cm² = 3.19 W/m² PAR ( 400 nm - 700 nm) 329 µW/cm² = 3.29 W/m² tmp ( 400 nm - 1100 nm) 342 µW/cm² = 3.42 W/m² blue ( 420 nm - 490 nm) 114 µW/cm² = 1.14 W/m² green ( 490 nm - 575 nm) 98.6 µW/cm² = 0.986 W/m² yellow ( 575 nm - 585 nm) 10.8 µW/cm² = 0.108 W/m² orange ( 585 nm - 650 nm) 69.2 µW/cm² = 0.692 W/m² red ( 650 nm - 780 nm) 48.2 µW/cm² = 0.482 W/m² IRA ( 700 nm - 1400 nm) 12.8 µW/cm² = 0.128 W/m² IR2 ( 720 nm - 1100 nm) 6.47 µW/cm² = 0.0647 W/m² IRB ( 1400 nm - 3000 nm) 0 µW/cm² = 0 W/m²
Actionspectra
Erythema 1.79 UV-Index Pyrimidine dimerization of DNA 15.1 µW/cm² Photoceratitis 2.72 µW/cm² Photoconjunctivitis 0.076 µW/cm² DNA Damage 0.203 Vitamin D3 8.37 µW/cm² Photosynthesis 237 µW/cm² Luminosity 886 lx Human L-Cone 131 µW/cm² Human M-Cone 112 µW/cm² Human S-Cone 93.9 µW/cm² CIE X 127 µW/cm² CIE Y 122 µW/cm² CIE Z 183 µW/cm² PAR 1490000 mol photons Extinction preD3 36.8 e-3*m²/mol Extinction Tachysterol 121 e-3*m²/mol Exctincition PreD3 16300 m²/mol Extinction Lumisterol 8.44 m²/mol Exctincition Tachysterol 154000 m²/mol Extinction 7DHC 6.92 m²/mol L-Cone 110 µW/cm² M-Cone 131 µW/cm² S-Cone 149 µW/cm² U-Cone 186 µW/cm² UVR - ICNIRP 2004 1.53 Rel Biol Eff Melatonin Supression 126 µW/cm² Blue Light Hazard 98.2 µW/cm² (111 µW/cm² per 1000 lx) CIE 174:2006 PreVit D3 9.59 µW/cm² Lumen Reptil 1150 "pseudo-lx" Vitamin D3 Degradation 5.74 µW/cm² Actinic UV 1.51 µW/cm² (17 mW/klm) Exctincition Lumisterol 11200 m²/mol Exctincition 7DHC 8890 m²/mol Exctincition Toxisterols 1990 m²/mol
Broadbandmeters
Solarmeter 6.2 (UVB, pre 2010) 29.3 µW/cm² Solarmeter 6.5 (UV-Index, pre 2010) 2.34 Leybold UVB 23.7 µW/cm² Leybold UVA 65.8 µW/cm² Leybold UVC 0.0238 µW/cm² DeltaOhm UVB 27.3 µW/cm² DeltaOhm UVC 4.68 µW/cm² Vernier UVB 14 µW/cm² Vernier UVA 42 µW/cm² Gröbel UVA 86.2 µW/cm² Gröbel UVB 15.2 µW/cm² Gröbel UVC 0.019 µW/cm² Luxmeter 900 lx Solarmeter 6.4 (D3) 7.32 IU/min UVX-31 32.4 µW/cm² IL UVB 0.0123 µW/cm² IL UVA 94.7 µW/cm² Solarmeter 6.5 (UVI, post 2010) 1.88 UV-Index Solarmeter 6.2 (UVB, post 2010) 15.9 µW/cm² (Solarmeter Ratio = 8.47) Solarmeter AlGaN 6.5 UVI sensor 20 UV Index GenUV 7.1 UV-Index 0.983 UV-Index Solarmeter 10.0 (Global Power) (manuf.) 4.24 W/m² Solarmeter 4.0 (UVA) 1.3 mW/cm² LS122 (manuf.) 0.00018 W/m² ISM400 (first guess) 2.66 W/m² LS122 (assumption) 0.124 W/m² ISM400_new 2.15 W/m² Solarmeter 10.0 (Global Power) (assumption) 3.8 W/m²