Halide Par30 50W
Spectrum 741: TG-HALIDEPROT-005 Edit
DeleteMeasurement
| Brand |
other other |
|---|---|
| Lamp Product |
Halide Prototype Prototype Lamp |
| Lamp ID |
TG-HALIDEPROT-005 (11/2023) Halide 50W |
| Spectrometer | FLAME UV-Vis (E) |
| Ballast | - no ballast or default/unknown ballast - |
| Reflector | |
| Distance | 30 cm |
| Age | 100 hours |
| Originator (measurement) | Thomas Griffiths |
Database entry created:
Thomas Griffiths (Tomaskas Ltd.)
26/Nov/2023 ; updated:
Thomas Griffiths (Tomaskas Ltd.)
26/Nov/2023
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 | ( 0.31 ; 0.33 ) | ( 0.17 ; 0.4 ) | ( 0.22 ; 0.14 ; 0.31 ) |
| CCT | 6400 Kelvin | 26000 Kelvin | 9900 Kelvin |
| distance | 0.092 | 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) 7120 µW/cm² = 71.2 W/m² UVC ( 0 nm - 280 nm) 1.47 µW/cm² = 0.0147 W/m² non-terrestrial ( 0 nm - 290 nm) 5.43 µW/cm² = 0.0543 W/m² total2 ( 250 nm - 880 nm) 7090 µW/cm² = 70.9 W/m² UVB (EU) ( 280 nm - 315 nm) 142 µW/cm² = 1.42 W/m² UVB (US) ( 280 nm - 320 nm) 162 µW/cm² = 1.62 W/m² UVA+B ( 280 nm - 380 nm) 1260 µW/cm² = 12.6 W/m² Solar UVB ( 290 nm - 315 nm) 138 µW/cm² = 1.38 W/m² UVA D3 regulating ( 315 nm - 335 nm) 90.3 µW/cm² = 0.903 W/m² UVA (EU) ( 315 nm - 380 nm) 1110 µW/cm² = 11.1 W/m² UVA2 (medical definition) ( 320 nm - 340 nm) 106 µW/cm² = 1.06 W/m² UVA (US) ( 320 nm - 380 nm) 1090 µW/cm² = 10.9 W/m² UVA1 (variant) ( 335 nm - 380 nm) 1020 µW/cm² = 10.2 W/m² UVA1 (medical) ( 340 nm - 400 nm) 1320 µW/cm² = 13.2 W/m² vis. UVA ( 350 nm - 380 nm) 921 µW/cm² = 9.21 W/m² VIS Rep3 ( 350 nm - 600 nm) 5470 µW/cm² = 54.7 W/m² VIS Rep4 ( 350 nm - 700 nm) 6030 µW/cm² = 60.3 W/m² purple ( 380 nm - 420 nm) 929 µW/cm² = 9.29 W/m² VIS ( 380 nm - 780 nm) 5340 µW/cm² = 53.4 W/m² VIS2 ( 400 nm - 680 nm) 4670 µW/cm² = 46.7 W/m² PAR ( 400 nm - 700 nm) 4770 µW/cm² = 47.7 W/m² tmp ( 400 nm - 1100 nm) 5530 µW/cm² = 55.3 W/m² blue ( 420 nm - 490 nm) 1420 µW/cm² = 14.2 W/m² green ( 490 nm - 575 nm) 1340 µW/cm² = 13.4 W/m² yellow ( 575 nm - 585 nm) 486 µW/cm² = 4.86 W/m² orange ( 585 nm - 650 nm) 685 µW/cm² = 6.85 W/m² red ( 650 nm - 780 nm) 474 µW/cm² = 4.74 W/m² IRA ( 700 nm - 1400 nm) 761 µW/cm² = 7.61 W/m² IR2 ( 720 nm - 1100 nm) 699 µW/cm² = 6.99 W/m² IRB ( 1400 nm - 3000 nm) 0 µW/cm² = 0 W/m²
Actionspectra
Erythema 11.9 UV-Index Pyrimidine dimerization of DNA 62.5 µW/cm² Photoceratitis 18.5 µW/cm² Photoconjunctivitis 1.9 µW/cm² DNA Damage 4.24 Vitamin D3 39.8 µW/cm² Photosynthesis 3270 µW/cm² Luminosity 14700 lx Human L-Cone 2180 µW/cm² Human M-Cone 1860 µW/cm² Human S-Cone 1300 µW/cm² CIE X 1970 µW/cm² CIE Y 2060 µW/cm² CIE Z 2230 µW/cm² PAR 22800000 mol photons Extinction preD3 221 e-3*m²/mol Extinction Tachysterol 779 e-3*m²/mol Exctincition PreD3 119000 m²/mol Extinction Lumisterol 84.5 m²/mol Exctincition Tachysterol 1040000 m²/mol Extinction 7DHC 102 m²/mol L-Cone 1830 µW/cm² M-Cone 1120 µW/cm² S-Cone 2580 µW/cm² U-Cone 2730 µW/cm² UVR - ICNIRP 2004 13.6 Rel Biol Eff Melatonin Supression 1590 µW/cm² Blue Light Hazard 1580 µW/cm² (108 µW/cm² per 1000 lx) CIE 174:2006 PreVit D3 41.8 µW/cm² Lumen Reptil 17500 "pseudo-lx" Vitamin D3 Degradation 34.3 µW/cm² Actinic UV 13.4 µW/cm² (9.14 mW/klm) Exctincition Lumisterol 105000 m²/mol Exctincition 7DHC 121000 m²/mol Exctincition Toxisterols 13900 m²/mol
Broadbandmeters
Solarmeter 6.2 (UVB, pre 2010) 180 µW/cm² Solarmeter 6.5 (UV-Index, pre 2010) 11.9 Leybold UVB 133 µW/cm² Leybold UVA 795 µW/cm² Leybold UVC 0.318 µW/cm² DeltaOhm UVB 211 µW/cm² DeltaOhm UVC 31 µW/cm² Vernier UVB 55.7 µW/cm² Vernier UVA 505 µW/cm² Gröbel UVA 934 µW/cm² Gröbel UVB 81.6 µW/cm² Gröbel UVC 0.732 µW/cm² Luxmeter 15500 lx Solarmeter 6.4 (D3) 37.3 IU/min UVX-31 263 µW/cm² IL UVB 0.0757 µW/cm² IL UVA 1010 µW/cm² Solarmeter 6.5 (UVI, post 2010) 8.57 UV-Index Solarmeter 6.2 (UVB, post 2010) 99.4 µW/cm² (Solarmeter Ratio = 11.6) Solarmeter AlGaN 6.5 UVI sensor 102 UV Index GenUV 7.1 UV-Index 5.5 UV-Index Solarmeter 10.0 (Global Power) (manuf.) 65.8 W/m² Solarmeter 4.0 (UVA) 15.6 mW/cm² LS122 (manuf.) 1.34 W/m² ISM400 (first guess) 46.3 W/m² LS122 (assumption) 2.77 W/m² ISM400_new 41.3 W/m² Solarmeter 10.0 (Global Power) (assumption) 59.8 W/m²