Arcadia D3+ 10%UVB Compact Lamp
Spectrum 516: BAC25 Edit
DeleteMeasurement
| Brand |
Arcadia UK company https://www.arcadiareptile.com/ |
|---|---|
| Lamp Product |
Arcadia D3+ 10% Compact Reptile Lamp Research project c/o Oonincx et al 2012 |
| Lamp ID |
BAC25 (10/2012) Arcadia D3+ 10% Compact Lamp |
| Spectrometer | USB2000+ (2) |
| Ballast | - no ballast or default/unknown ballast - |
| Reflector | |
| Distance | 10 cm |
| Age | 105 hours |
| Originator (measurement) | Frances Baines |
Database entry created:
Frances Baines
11/Jan/2015 ; updated:
Frances Baines
11/Jan/2015
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.
WARNING: The measurement range (350 - 800 nm) is not sufficient for this evaluation! Data is only available in the range 250.23 - 750.24 nm. Results are shown anyway but should be ignored by anyone except experts.
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 | ( 0.31 ; 0.3 ) | ( 0.27 ; 0.5 ) | ( 0.24 ; 0.2 ; 0.38 ) |
| CCT | 7400 Kelvin | 8300 Kelvin | 6700 Kelvin |
| distance | 0.17 | 0.13 | |
| 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) 2280 µW/cm² = 22.8 W/m² UVC ( 0 nm - 280 nm) 0.018 µW/cm² = 0.00018 W/m² non-terrestrial ( 0 nm - 290 nm) 0.255 µW/cm² = 0.00255 W/m² total2 ( 250 nm - 880 nm) 2280 µW/cm² = 22.8 W/m² UVB (EU) ( 280 nm - 315 nm) 131 µW/cm² = 1.31 W/m² UVB (US) ( 280 nm - 320 nm) 216 µW/cm² = 2.16 W/m² UVA+B ( 280 nm - 380 nm) 1000 µW/cm² = 10 W/m² Solar UVB ( 290 nm - 315 nm) 131 µW/cm² = 1.31 W/m² UVA D3 regulating ( 315 nm - 335 nm) 385 µW/cm² = 3.85 W/m² UVA (EU) ( 315 nm - 380 nm) 868 µW/cm² = 8.68 W/m² UVA2 (medical definition) ( 320 nm - 340 nm) 411 µW/cm² = 4.11 W/m² UVA (US) ( 320 nm - 380 nm) 784 µW/cm² = 7.84 W/m² UVA1 (variant) ( 335 nm - 380 nm) 483 µW/cm² = 4.83 W/m² UVA1 (medical) ( 340 nm - 400 nm) 380 µW/cm² = 3.8 W/m² vis. UVA ( 350 nm - 380 nm) 192 µW/cm² = 1.92 W/m² VIS Rep3 ( 350 nm - 600 nm) 1210 µW/cm² = 12.1 W/m² VIS Rep4 ( 350 nm - 700 nm) 1450 µW/cm² = 14.5 W/m² purple ( 380 nm - 420 nm) 117 µW/cm² = 1.17 W/m² VIS ( 380 nm - 780 nm) 1280 µW/cm² = 12.8 W/m² VIS2 ( 400 nm - 680 nm) 1250 µW/cm² = 12.5 W/m² PAR ( 400 nm - 700 nm) 1250 µW/cm² = 12.5 W/m² tmp ( 400 nm - 1100 nm) 1270 µW/cm² = 12.7 W/m² blue ( 420 nm - 490 nm) 438 µW/cm² = 4.38 W/m² green ( 490 nm - 575 nm) 368 µW/cm² = 3.68 W/m² yellow ( 575 nm - 585 nm) 56.4 µW/cm² = 0.564 W/m² orange ( 585 nm - 650 nm) 258 µW/cm² = 2.58 W/m² red ( 650 nm - 780 nm) 40.8 µW/cm² = 0.408 W/m² IRA ( 700 nm - 1400 nm) 17 µW/cm² = 0.17 W/m² IR2 ( 720 nm - 1100 nm) 0.664 µW/cm² = 0.00664 W/m² IRB ( 1400 nm - 3000 nm) 0 µW/cm² = 0 W/m²
Actionspectra
Erythema 6.87 UV-Index Pyrimidine dimerization of DNA 79.5 µW/cm² Photoceratitis 11 µW/cm² Photoconjunctivitis 0.21 µW/cm² DNA Damage 0.661 Vitamin D3 30.1 µW/cm² Photosynthesis 875 µW/cm² Luminosity 3680 lx Human L-Cone 548 µW/cm² Human M-Cone 460 µW/cm² Human S-Cone 379 µW/cm² CIE X 528 µW/cm² CIE Y 510 µW/cm² CIE Z 690 µW/cm² PAR 6080000 mol photons Extinction preD3 226 e-3*m²/mol Extinction Tachysterol 809 e-3*m²/mol Exctincition PreD3 108000 m²/mol Extinction Lumisterol 25.9 m²/mol Exctincition Tachysterol 1190000 m²/mol Extinction 7DHC 21.3 m²/mol L-Cone 453 µW/cm² M-Cone 373 µW/cm² S-Cone 703 µW/cm² U-Cone 325 µW/cm² UVR - ICNIRP 2004 5.01 Rel Biol Eff Melatonin Supression 470 µW/cm² Blue Light Hazard 431 µW/cm² (117 µW/cm² per 1000 lx) CIE 174:2006 PreVit D3 33 µW/cm² Lumen Reptil 4120 "pseudo-lx" Vitamin D3 Degradation 41.7 µW/cm² Actinic UV 4.98 µW/cm² (13.6 mW/klm) Exctincition Lumisterol 40300 m²/mol Exctincition 7DHC 28500 m²/mol Exctincition Toxisterols 20100 m²/mol
Broadbandmeters
Solarmeter 6.2 (UVB, pre 2010) 265 µW/cm² Solarmeter 6.5 (UV-Index, pre 2010) 8.75 Leybold UVB 188 µW/cm² Leybold UVA 558 µW/cm² Leybold UVC 0.0108 µW/cm² DeltaOhm UVB 481 µW/cm² DeltaOhm UVC 56.1 µW/cm² Vernier UVB 60.2 µW/cm² Vernier UVA 651 µW/cm² Gröbel UVA 732 µW/cm² Gröbel UVB 90.2 µW/cm² Gröbel UVC -0.0477 µW/cm² Luxmeter 3760 lx Solarmeter 6.4 (D3) 27.4 IU/min UVX-31 521 µW/cm² IL UVB 0.112 µW/cm² IL UVA 615 µW/cm² Solarmeter 6.5 (UVI, post 2010) 7.45 UV-Index Solarmeter 6.2 (UVB, post 2010) 182 µW/cm² (Solarmeter Ratio = 24.4) Solarmeter AlGaN 6.5 UVI sensor 109 UV Index GenUV 7.1 UV-Index 6.31 UV-Index Solarmeter 10.0 (Global Power) (manuf.) 16.3 W/m² Solarmeter 4.0 (UVA) 7.76 mW/cm² LS122 (manuf.) 0 W/m² ISM400 (first guess) 8.12 W/m² LS122 (assumption) 0.383 W/m² ISM400_new 6.16 W/m² Solarmeter 10.0 (Global Power) (assumption) 13.2 W/m²