CCT:1019 6705K
CRI DC:1017 2.52E-03
CRI R01:1002 66.5 (6705K)
CRI R02:1003 56.7 (6705K)
CRI R03:1004 45.3 (6705K)
CRI R04:1005 9.2 (6705K)
CRI R05:1006 11.1 (6705K)
CRI R06:1007 26.9 (6705K)
CRI R07:1008 69.1 (6705K)
CRI R08:1009 73.2 (6705K)
CRI R09:1010 -111.7 (6705K)
CRI R10:1011 64.9 (6705K)
CRI R11:1012 19.9 (6705K)
CRI R12:1013 40.3 (6705K)
CRI R13:1014 42.5 (6705K)
CRI R14:1015 63.2 (6705K)
CRI R15:1016 66.6 (6705K)
CRI Ra:1001 44.8 (6705K)
DC<5.4E-3:1018 TRUE
Spectrum 742: TG-HALIDEPROT-007 Edit
DeleteMeasurement
| Brand |
other other |
|---|---|
| Lamp Product |
Halide Prototype Prototype Lamp |
| Lamp ID |
TG-HALIDEPROT-007 (11/2023) Prototype 70W Par30 |
| Spectrometer | FLAME UV-Vis (E) |
| Ballast | - no ballast or default/unknown ballast - |
| Reflector | |
| Distance | 30 cm |
| Age | 95 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 ; 0.32 ) | ( 0.2 ; 0.38 ) | ( 0.21 ; 0.16 ; 0.3 ) |
| CCT | 6700 Kelvin | 19000 Kelvin | 10000 Kelvin |
| distance | 0.061 | 0.08 | |
| 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) 7900 µW/cm² = 79 W/m² UVC ( 0 nm - 280 nm) 0 µW/cm² = 0 W/m² non-terrestrial ( 0 nm - 290 nm) 1.96 µW/cm² = 0.0196 W/m² total2 ( 250 nm - 880 nm) 7870 µW/cm² = 78.7 W/m² UVB (EU) ( 280 nm - 315 nm) 104 µW/cm² = 1.04 W/m² UVB (US) ( 280 nm - 320 nm) 120 µW/cm² = 1.2 W/m² UVA+B ( 280 nm - 380 nm) 1320 µW/cm² = 13.2 W/m² Solar UVB ( 290 nm - 315 nm) 102 µW/cm² = 1.02 W/m² UVA D3 regulating ( 315 nm - 335 nm) 96.2 µW/cm² = 0.962 W/m² UVA (EU) ( 315 nm - 380 nm) 1220 µW/cm² = 12.2 W/m² UVA2 (medical definition) ( 320 nm - 340 nm) 131 µW/cm² = 1.31 W/m² UVA (US) ( 320 nm - 380 nm) 1200 µW/cm² = 12 W/m² UVA1 (variant) ( 335 nm - 380 nm) 1120 µW/cm² = 11.2 W/m² UVA1 (medical) ( 340 nm - 400 nm) 1530 µW/cm² = 15.3 W/m² vis. UVA ( 350 nm - 380 nm) 978 µW/cm² = 9.78 W/m² VIS Rep3 ( 350 nm - 600 nm) 6030 µW/cm² = 60.3 W/m² VIS Rep4 ( 350 nm - 700 nm) 6690 µW/cm² = 66.9 W/m² purple ( 380 nm - 420 nm) 1170 µW/cm² = 11.7 W/m² VIS ( 380 nm - 780 nm) 5960 µW/cm² = 59.6 W/m² PAR ( 400 nm - 700 nm) 5250 µW/cm² = 52.5 W/m² blue ( 420 nm - 490 nm) 1570 µW/cm² = 15.7 W/m² green ( 490 nm - 575 nm) 1510 µW/cm² = 15.1 W/m² yellow ( 575 nm - 585 nm) 348 µW/cm² = 3.48 W/m² orange ( 585 nm - 650 nm) 846 µW/cm² = 8.46 W/m² red ( 650 nm - 780 nm) 514 µW/cm² = 5.14 W/m² IRA ( 700 nm - 1400 nm) 870 µW/cm² = 8.7 W/m² IRB ( 1400 nm - 3000 nm) 0 µW/cm² = 0 W/m²
Actionspectra
Erythema 7.97 UV-Index Pyrimidine dimerization of DNA 47 µW/cm² Photoceratitis 13 µW/cm² Photoconjunctivitis 0.569 µW/cm² DNA Damage 1.79 Vitamin D3 28.2 µW/cm² Photosynthesis 3640 µW/cm² Luminosity 15200 lx Human L-Cone 2250 µW/cm² Human M-Cone 1920 µW/cm² Human S-Cone 1410 µW/cm² CIE X 2040 µW/cm² CIE Y 2110 µW/cm² CIE Z 2420 µW/cm² PAR 25000000 mol photons Extinction preD3 153 e-3*m²/mol Extinction Tachysterol 544 e-3*m²/mol Exctincition PreD3 79000 m²/mol Extinction Lumisterol 46.6 m²/mol Exctincition Tachysterol 754000 m²/mol Extinction 7DHC 54.1 m²/mol L-Cone 1880 µW/cm² M-Cone 1450 µW/cm² S-Cone 2750 µW/cm² U-Cone 3090 µW/cm² UVR - ICNIRP 2004 8.25 Rel Biol Eff Melatonin Supression 1850 µW/cm² Blue Light Hazard 1740 µW/cm² (115 µW/cm² per 1000 lx) CIE 174:2006 PreVit D3 29.8 µW/cm² Lumen Reptil 19300 "pseudo-lx" Vitamin D3 Degradation 24.6 µW/cm² Actinic UV 8.1 µW/cm² (5.34 mW/klm) Exctincition Lumisterol 59700 m²/mol Exctincition 7DHC 65900 m²/mol Exctincition Toxisterols 10800 m²/mol
Broadbandmeters
Solarmeter 6.2 (UVB, pre 2010) 138 µW/cm² Solarmeter 6.5 (UV-Index, pre 2010) 8.19 Leybold UVB 101 µW/cm² Leybold UVA 902 µW/cm² Leybold UVC 0.0304 µW/cm² DeltaOhm UVB 190 µW/cm² DeltaOhm UVC 24.4 µW/cm² Vernier UVB 40.8 µW/cm² Vernier UVA 555 µW/cm² Gröbel UVA 1020 µW/cm² Gröbel UVB 60.2 µW/cm² Gröbel UVC 0.0292 µW/cm² Solarmeter 6.4 (D3) 25.6 IU/min UVX-31 248 µW/cm² IL UVB 0.0605 µW/cm² IL UVA 1110 µW/cm² Solarmeter 6.5 (UVI, post 2010) 6.07 UV-Index Solarmeter 6.2 (UVB, post 2010) 78.8 µW/cm² (Solarmeter Ratio = 13) Solarmeter AlGaN 6.5 UVI sensor 74.5 UV Index GenUV 7.1 UV-Index 4.12 UV-Index Solarmeter 10.0 (Global Power) 73 W/m² Solarmeter 4.0 (UVA) 17.6 mW/cm² LS122 0.978 W/m² ISM400 51.5 W/m²