Miniature 13W compact fluorescent lamp (bar type)
Spectrum 517: BZC32 Edit
DeleteMeasurement
| Brand |
Zoo Med Zoo Med Laboratories, Inc http://www.zoomed.com/ |
|---|---|
| Lamp Product |
Reptisun 5.0 Tropical Compact 13 watt Miniature compact lamp - bar type |
| Lamp ID |
BZC32 (04/2014) Miniature 13W 5.0 UVB compact lamp |
| Spectrometer | USB2000+ (2) |
| Ballast | - no ballast or default/unknown ballast - |
| Reflector | |
| Distance | 10 cm |
| Age | 1 hours |
| Originator (measurement) | Frances Baines |
Database entry created:
Frances Baines
14/Jan/2015 ; updated:
Frances Baines
14/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 | ( 0.29 ; 0.31 ) | ( 0.47 ; 0.44 ) | ( 0.26 ; 0.35 ; 0.33 ) |
| CCT | 8800 Kelvin | 4200 Kelvin | 5300 Kelvin |
| distance | 0.11 | 0.11 | |
| 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) 786 µW/cm² = 7.86 W/m² UVC ( 0 nm - 280 nm) 0 µW/cm² = 0 W/m² non-terrestrial ( 0 nm - 290 nm) 0.00125 µW/cm² = 1.25E-5 W/m² total2 ( 250 nm - 880 nm) 786 µW/cm² = 7.86 W/m² UVB (EU) ( 280 nm - 315 nm) 18.1 µW/cm² = 0.181 W/m² UVB (US) ( 280 nm - 320 nm) 28.2 µW/cm² = 0.282 W/m² UVA+B ( 280 nm - 380 nm) 108 µW/cm² = 1.08 W/m² Solar UVB ( 290 nm - 315 nm) 18.1 µW/cm² = 0.181 W/m² UVA D3 regulating ( 315 nm - 335 nm) 41.3 µW/cm² = 0.413 W/m² UVA (EU) ( 315 nm - 380 nm) 89.7 µW/cm² = 0.897 W/m² UVA2 (medical definition) ( 320 nm - 340 nm) 41.8 µW/cm² = 0.418 W/m² UVA (US) ( 320 nm - 380 nm) 79.5 µW/cm² = 0.795 W/m² UVA1 (variant) ( 335 nm - 380 nm) 48.4 µW/cm² = 0.484 W/m² UVA1 (medical) ( 340 nm - 400 nm) 39.6 µW/cm² = 0.396 W/m² vis. UVA ( 350 nm - 380 nm) 20.6 µW/cm² = 0.206 W/m² VIS Rep3 ( 350 nm - 600 nm) 525 µW/cm² = 5.25 W/m² VIS Rep4 ( 350 nm - 700 nm) 673 µW/cm² = 6.73 W/m² purple ( 380 nm - 420 nm) 23.6 µW/cm² = 0.236 W/m² VIS ( 380 nm - 780 nm) 678 µW/cm² = 6.78 W/m² VIS2 ( 400 nm - 680 nm) 632 µW/cm² = 6.32 W/m² PAR ( 400 nm - 700 nm) 651 µW/cm² = 6.51 W/m² tmp ( 400 nm - 1100 nm) 676 µW/cm² = 6.76 W/m² blue ( 420 nm - 490 nm) 218 µW/cm² = 2.18 W/m² green ( 490 nm - 575 nm) 211 µW/cm² = 2.11 W/m² yellow ( 575 nm - 585 nm) 25.5 µW/cm² = 0.255 W/m² orange ( 585 nm - 650 nm) 115 µW/cm² = 1.15 W/m² red ( 650 nm - 780 nm) 84.9 µW/cm² = 0.849 W/m² IRA ( 700 nm - 1400 nm) 25.3 µW/cm² = 0.253 W/m² IR2 ( 720 nm - 1100 nm) 12.1 µW/cm² = 0.121 W/m² IRB ( 1400 nm - 3000 nm) 0 µW/cm² = 0 W/m²
Actionspectra
Erythema 0.935 UV-Index Pyrimidine dimerization of DNA 10.8 µW/cm² Photoceratitis 1.5 µW/cm² Photoconjunctivitis 0.0211 µW/cm² DNA Damage 0.0719 Vitamin D3 4.27 µW/cm² Photosynthesis 464 µW/cm² Luminosity 1760 lx Human L-Cone 257 µW/cm² Human M-Cone 231 µW/cm² Human S-Cone 170 µW/cm² CIE X 227 µW/cm² CIE Y 243 µW/cm² CIE Z 326 µW/cm² PAR 3020000 mol photons Extinction preD3 29.6 e-3*m²/mol Extinction Tachysterol 104 e-3*m²/mol Exctincition PreD3 13700 m²/mol Extinction Lumisterol 3.41 m²/mol Exctincition Tachysterol 148000 m²/mol Extinction 7DHC 2.57 m²/mol L-Cone 210 µW/cm² M-Cone 287 µW/cm² S-Cone 272 µW/cm² U-Cone 53.5 µW/cm² UVR - ICNIRP 2004 0.669 Rel Biol Eff Melatonin Supression 249 µW/cm² Blue Light Hazard 185 µW/cm² (105 µW/cm² per 1000 lx) CIE 174:2006 PreVit D3 4.72 µW/cm² Lumen Reptil 1910 "pseudo-lx" Vitamin D3 Degradation 5.36 µW/cm² Actinic UV 0.664 µW/cm² (3.77 mW/klm) Exctincition Lumisterol 5310 m²/mol Exctincition 7DHC 3540 m²/mol Exctincition Toxisterols 2380 m²/mol
Broadbandmeters
Solarmeter 6.2 (UVB, pre 2010) 33.3 µW/cm² Solarmeter 6.5 (UV-Index, pre 2010) 1.22 Leybold UVB 24.2 µW/cm² Leybold UVA 55.7 µW/cm² Leybold UVC 0.000763 µW/cm² DeltaOhm UVB 54.9 µW/cm² DeltaOhm UVC 6.75 µW/cm² Vernier UVB 8.43 µW/cm² Vernier UVA 68.1 µW/cm² Gröbel UVA 75.4 µW/cm² Gröbel UVB 12 µW/cm² Gröbel UVC -0.00834 µW/cm² Luxmeter 1810 lx Solarmeter 6.4 (D3) 3.81 IU/min UVX-31 59.2 µW/cm² IL UVB 0.0137 µW/cm² IL UVA 62.7 µW/cm² Solarmeter 6.5 (UVI, post 2010) 1.04 UV-Index Solarmeter 6.2 (UVB, post 2010) 22.2 µW/cm² (Solarmeter Ratio = 21.4) Solarmeter AlGaN 6.5 UVI sensor 14.9 UV Index GenUV 7.1 UV-Index 0.837 UV-Index Solarmeter 10.0 (Global Power) (manuf.) 7.39 W/m² Solarmeter 4.0 (UVA) 0.819 mW/cm² LS122 (manuf.) 0 W/m² ISM400 (first guess) 4.83 W/m² LS122 (assumption) 0.222 W/m² ISM400_new 3.89 W/m² Solarmeter 10.0 (Global Power) (assumption) 6.86 W/m²