Sylvania Hi-Spot 63: 50 watt, 240 volt PAR20 halogen 10° spotlight with E27 screw fitting.
Spectrum 415: BSY8 Edit
DeleteMeasurement
| Brand |
Sylvania Sylvania http://www.sylvania-lamps.com/ |
|---|---|
| Lamp Product |
Halogen 10° Spot lamp |
| Lamp ID |
BSY8 (12/2011) Sylvania Hi-Spot 63 PAR20 50W Halogen 10° Spot lamp |
| Spectrometer | USB2000+ (2) |
| Ballast | - no ballast or default/unknown ballast - |
| Reflector | |
| Distance | 30 cm |
| Age | 1 hours |
| Originator (measurement) | Frances Baines |
Database entry created:
Frances Baines
15/Dec/2011 ; updated:
Sarina Wunderlich
4/Jul/2014
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 | ( 0.45 ; 0.41 ) | ( 0.62 ; 0.29 ) | ( 0.54 ; 0.29 ; 0.13 ) |
| CCT | 2800 Kelvin | 2700 Kelvin | 2800 Kelvin |
| distance | 0.012 | 0.0076 | |
| 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) 11100 µW/cm² = 111 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) 11100 µW/cm² = 111 W/m² UVB (EU) ( 280 nm - 315 nm) 0.253 µW/cm² = 0.00253 W/m² UVB (US) ( 280 nm - 320 nm) 0.424 µW/cm² = 0.00424 W/m² UVA+B ( 280 nm - 380 nm) 29.6 µW/cm² = 0.296 W/m² Solar UVB ( 290 nm - 315 nm) 0.253 µW/cm² = 0.00253 W/m² UVA D3 regulating ( 315 nm - 335 nm) 1.46 µW/cm² = 0.0146 W/m² UVA (EU) ( 315 nm - 380 nm) 29.3 µW/cm² = 0.293 W/m² UVA2 (medical definition) ( 320 nm - 340 nm) 2.22 µW/cm² = 0.0222 W/m² UVA (US) ( 320 nm - 380 nm) 29.1 µW/cm² = 0.291 W/m² UVA1 (variant) ( 335 nm - 380 nm) 27.9 µW/cm² = 0.279 W/m² UVA1 (medical) ( 340 nm - 400 nm) 62.8 µW/cm² = 0.628 W/m² vis. UVA ( 350 nm - 380 nm) 24 µW/cm² = 0.24 W/m² VIS Rep3 ( 350 nm - 600 nm) 2630 µW/cm² = 26.3 W/m² VIS Rep4 ( 350 nm - 700 nm) 6110 µW/cm² = 61.1 W/m² purple ( 380 nm - 420 nm) 97.5 µW/cm² = 0.975 W/m² VIS ( 380 nm - 780 nm) 10000 µW/cm² = 100 W/m² PAR ( 400 nm - 700 nm) 6050 µW/cm² = 60.5 W/m² blue ( 420 nm - 490 nm) 515 µW/cm² = 5.15 W/m² green ( 490 nm - 575 nm) 1390 µW/cm² = 13.9 W/m² yellow ( 575 nm - 585 nm) 228 µW/cm² = 2.28 W/m² orange ( 585 nm - 650 nm) 1890 µW/cm² = 18.9 W/m² red ( 650 nm - 780 nm) 5890 µW/cm² = 58.9 W/m² IRA ( 700 nm - 1400 nm) 5000 µW/cm² = 50 W/m² IRB ( 1400 nm - 3000 nm) 0 µW/cm² = 0 W/m²
Actionspectra
Erythema 0.0342 UV-Index Pyrimidine dimerization of DNA 0.192 µW/cm² Photoceratitis 0.0383 µW/cm² Photoconjunctivitis 0.00121 µW/cm² DNA Damage 0.00424 Vitamin D3 0.1 µW/cm² Photosynthesis 4370 µW/cm² Luminosity 15700 lx Human L-Cone 2470 µW/cm² Human M-Cone 1700 µW/cm² Human S-Cone 398 µW/cm² CIE X 2410 µW/cm² CIE Y 2180 µW/cm² CIE Z 774 µW/cm² PAR 30700000 mol photons Extinction preD3 0.574 e-3*m²/mol Extinction Tachysterol 2.12 e-3*m²/mol Exctincition PreD3 355 m²/mol Extinction Lumisterol 0.14 m²/mol Exctincition Tachysterol 4110 m²/mol Extinction 7DHC 0.146 m²/mol L-Cone 2330 µW/cm² M-Cone 1230 µW/cm² S-Cone 579 µW/cm² U-Cone 174 µW/cm² UVR - ICNIRP 2004 0.031 Rel Biol Eff Melatonin Supression 711 µW/cm² Blue Light Hazard 450 µW/cm² (28.7 µW/cm² per 1000 lx) CIE 174:2006 PreVit D3 0.109 µW/cm² Lumen Reptil 11600 "pseudo-lx" Vitamin D3 Degradation 0.102 µW/cm² Actinic UV 0.0305 µW/cm² (0.0195 mW/klm) Exctincition Lumisterol 180 m²/mol Exctincition 7DHC 180 m²/mol Exctincition Toxisterols 89.8 m²/mol
Broadbandmeters
Solarmeter 6.2 (UVB, pre 2010) 0.831 µW/cm² Solarmeter 6.5 (UV-Index, pre 2010) 0.032 Leybold UVB 0.416 µW/cm² Leybold UVA 23.8 µW/cm² Leybold UVC 7.09E-5 µW/cm² DeltaOhm UVB 1.85 µW/cm² DeltaOhm UVC 0.145 µW/cm² Vernier UVB 0.143 µW/cm² Vernier UVA 11.7 µW/cm² Gröbel UVA 23.4 µW/cm² Gröbel UVB 0.245 µW/cm² Gröbel UVC -2.88E-5 µW/cm² Solarmeter 6.4 (D3) 0.1 IU/min UVX-31 2.97 µW/cm² IL UVB 0.000433 µW/cm² IL UVA 28.6 µW/cm² Solarmeter 6.5 (UVI, post 2010) 0.0233 UV-Index Solarmeter 6.2 (UVB, post 2010) 0.447 µW/cm² (Solarmeter Ratio = 19.2) Solarmeter AlGaN 6.5 UVI sensor 0.239 UV Index GenUV 7.1 UV-Index 0.0236 UV-Index Solarmeter 10.0 (Global Power) 153 W/m² Solarmeter 4.0 (UVA) 0.631 mW/cm² LS122 0 W/m² ISM400 156 W/m²