35W Par30
Spectrum 740: TG-HALIDEPROT-003 Edit
DeleteMeasurement
| Brand |
other other |
|---|---|
| Lamp Product |
Halide Prototype Prototype Lamp |
| Lamp ID |
TG-HALIDEPROT-003 (11/2023) Halide Prototype 35W |
| 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 ; 0.36 ) | ( 0.18 ; 0.37 ) | ( 0.22 ; 0.14 ; 0.28 ) |
| CCT | 6600 Kelvin | 32000 Kelvin | 9400 Kelvin |
| distance | 0.055 | 0.1 | |
| 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) 7330 µW/cm² = 73.3 W/m² UVC ( 0 nm - 280 nm) 1.92 µW/cm² = 0.0192 W/m² non-terrestrial ( 0 nm - 290 nm) 5.82 µW/cm² = 0.0582 W/m² total2 ( 250 nm - 880 nm) 7300 µW/cm² = 73 W/m² UVB (EU) ( 280 nm - 315 nm) 173 µW/cm² = 1.73 W/m² UVB (US) ( 280 nm - 320 nm) 195 µW/cm² = 1.95 W/m² UVA+B ( 280 nm - 380 nm) 1540 µW/cm² = 15.4 W/m² Solar UVB ( 290 nm - 315 nm) 170 µW/cm² = 1.7 W/m² UVA D3 regulating ( 315 nm - 335 nm) 110 µW/cm² = 1.1 W/m² UVA (EU) ( 315 nm - 380 nm) 1360 µW/cm² = 13.6 W/m² UVA2 (medical definition) ( 320 nm - 340 nm) 136 µW/cm² = 1.36 W/m² UVA (US) ( 320 nm - 380 nm) 1340 µW/cm² = 13.4 W/m² UVA1 (variant) ( 335 nm - 380 nm) 1250 µW/cm² = 12.5 W/m² UVA1 (medical) ( 340 nm - 400 nm) 1520 µW/cm² = 15.2 W/m² vis. UVA ( 350 nm - 380 nm) 1150 µW/cm² = 11.5 W/m² VIS Rep3 ( 350 nm - 600 nm) 5890 µW/cm² = 58.9 W/m² VIS Rep4 ( 350 nm - 700 nm) 6290 µW/cm² = 62.9 W/m² purple ( 380 nm - 420 nm) 969 µW/cm² = 9.69 W/m² VIS ( 380 nm - 780 nm) 5330 µW/cm² = 53.3 W/m² PAR ( 400 nm - 700 nm) 4830 µW/cm² = 48.3 W/m² blue ( 420 nm - 490 nm) 1310 µW/cm² = 13.1 W/m² green ( 490 nm - 575 nm) 1660 µW/cm² = 16.6 W/m² yellow ( 575 nm - 585 nm) 474 µW/cm² = 4.74 W/m² orange ( 585 nm - 650 nm) 579 µW/cm² = 5.79 W/m² red ( 650 nm - 780 nm) 337 µW/cm² = 3.37 W/m² IRA ( 700 nm - 1400 nm) 651 µW/cm² = 6.51 W/m² IRB ( 1400 nm - 3000 nm) 0 µW/cm² = 0 W/m²
Actionspectra
Erythema 13 UV-Index Pyrimidine dimerization of DNA 73.5 µW/cm² Photoceratitis 20.6 µW/cm² Photoconjunctivitis 2.16 µW/cm² DNA Damage 4.64 Vitamin D3 44.1 µW/cm² Photosynthesis 3170 µW/cm² Luminosity 16100 lx Human L-Cone 2360 µW/cm² Human M-Cone 2110 µW/cm² Human S-Cone 1220 µW/cm² CIE X 1940 µW/cm² CIE Y 2270 µW/cm² CIE Z 2100 µW/cm² PAR 23600000 mol photons Extinction preD3 257 e-3*m²/mol Extinction Tachysterol 898 e-3*m²/mol Exctincition PreD3 137000 m²/mol Extinction Lumisterol 90.7 m²/mol Exctincition Tachysterol 1200000 m²/mol Extinction 7DHC 109 m²/mol L-Cone 1940 µW/cm² M-Cone 1230 µW/cm² S-Cone 2460 µW/cm² U-Cone 3050 µW/cm² UVR - ICNIRP 2004 14.7 Rel Biol Eff Melatonin Supression 1540 µW/cm² Blue Light Hazard 1490 µW/cm² (92.3 µW/cm² per 1000 lx) CIE 174:2006 PreVit D3 46.3 µW/cm² Lumen Reptil 18300 "pseudo-lx" Vitamin D3 Degradation 40.4 µW/cm² Actinic UV 14.5 µW/cm² (8.97 mW/klm) Exctincition Lumisterol 114000 m²/mol Exctincition 7DHC 129000 m²/mol Exctincition Toxisterols 16500 m²/mol
Broadbandmeters
Solarmeter 6.2 (UVB, pre 2010) 216 µW/cm² Solarmeter 6.5 (UV-Index, pre 2010) 13.2 Leybold UVB 161 µW/cm² Leybold UVA 971 µW/cm² Leybold UVC 0.454 µW/cm² DeltaOhm UVB 257 µW/cm² DeltaOhm UVC 37.5 µW/cm² Vernier UVB 64.5 µW/cm² Vernier UVA 623 µW/cm² Gröbel UVA 1150 µW/cm² Gröbel UVB 95.6 µW/cm² Gröbel UVC 0.932 µW/cm² Solarmeter 6.4 (D3) 41.2 IU/min UVX-31 322 µW/cm² IL UVB 0.0899 µW/cm² IL UVA 1230 µW/cm² Solarmeter 6.5 (UVI, post 2010) 9.63 UV-Index Solarmeter 6.2 (UVB, post 2010) 121 µW/cm² (Solarmeter Ratio = 12.6) Solarmeter AlGaN 6.5 UVI sensor 122 UV Index GenUV 7.1 UV-Index 6.57 UV-Index Solarmeter 10.0 (Global Power) 65.3 W/m² Solarmeter 4.0 (UVA) 18.4 mW/cm² LS122 0.725 W/m² ISM400 43.7 W/m²