CCT:1061
11270K
CRI DC:1059
8.02E-3
CRI R01:1044
16.2 (11270K)
CRI R02:1045
34.8 (11270K)
CRI R03:1046
52.1 (11270K)
CRI R04:1047
42.2 (11270K)
CRI R05:1048
18.1 (11270K)
CRI R06:1049
4.2 (11270K)
CRI R07:1050
-2.2 (11270K)
CRI R08:1051
-6.4 (11270K)
CRI R09:1052
38.6 (11270K)
CRI R10:1053
35.3 (11270K)
CRI R11:1054
58.5 (11270K)
CRI R12:1055
45.0 (11270K)
CRI R13:1056
-3.5 (11270K)
CRI R14:1057
64.8 (11270K)
CRI R15:1058
19.6 (11270K)
CRI Ra:1043
19.9 (11270K)
DC<5.4E-3:1060
false
Spectrum 808: TG-ETUVB20024W-001 Edit
DeleteMeasurement
| Brand |
Exo Terra Rolf C. Hagen Inc. http://www.hagen.com/ |
|---|---|
| Lamp Product |
Exo Terra UVB200 T5HO 24W Exo Terra UVB200 T5HO 24W |
| Lamp ID |
TG-ETUVB20024W-001 (09/2024) TG-ETUVB20024W-001 |
| Spectrometer | FLAME UV-Vis (E) |
| Ballast | - no ballast or default/unknown ballast - |
| Reflector | |
| Distance | 25 cm |
| Age | 100 hours |
| Originator (measurement) | Thomas Griffiths |
Database entry created:
Thomas Griffiths (Tomaskas Ltd.)
10/Oct/2024 ; updated:
Thomas Griffiths (Tomaskas Ltd.)
10/Oct/2024
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 | ( 0.28 ; 0.28 ) | ( 0.23 ; 0.4 ) | ( 0.18 ; 0.19 ; 0.33 ) |
| CCT | 11000 Kelvin | 12000 Kelvin | 11000 Kelvin |
| distance | 0.074 | 0.061 | |
| 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) 1170 µW/cm² = 11.7 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) 1170 µW/cm² = 11.7 W/m² UVB (EU) ( 280 nm - 315 nm) 36.8 µW/cm² = 0.368 W/m² UVB (US) ( 280 nm - 320 nm) 69.9 µW/cm² = 0.699 W/m² UVA+B ( 280 nm - 380 nm) 565 µW/cm² = 5.65 W/m² Solar UVB ( 290 nm - 315 nm) 36.8 µW/cm² = 0.368 W/m² UVA D3 regulating ( 315 nm - 335 nm) 186 µW/cm² = 1.86 W/m² UVA (EU) ( 315 nm - 380 nm) 528 µW/cm² = 5.28 W/m² UVA2 (medical definition) ( 320 nm - 340 nm) 218 µW/cm² = 2.18 W/m² UVA (US) ( 320 nm - 380 nm) 495 µW/cm² = 4.95 W/m² UVA1 (variant) ( 335 nm - 380 nm) 342 µW/cm² = 3.42 W/m² UVA1 (medical) ( 340 nm - 400 nm) 304 µW/cm² = 3.04 W/m² vis. UVA ( 350 nm - 380 nm) 158 µW/cm² = 1.58 W/m² VIS Rep3 ( 350 nm - 600 nm) 621 µW/cm² = 6.21 W/m² VIS Rep4 ( 350 nm - 700 nm) 727 µW/cm² = 7.27 W/m² purple ( 380 nm - 420 nm) 80.2 µW/cm² = 0.802 W/m² VIS ( 380 nm - 780 nm) 594 µW/cm² = 5.94 W/m² VIS2 ( 400 nm - 680 nm) 529 µW/cm² = 5.29 W/m² PAR ( 400 nm - 700 nm) 542 µW/cm² = 5.42 W/m² tmp ( 400 nm - 1100 nm) 578 µW/cm² = 5.78 W/m² blue ( 420 nm - 490 nm) 188 µW/cm² = 1.88 W/m² green ( 490 nm - 575 nm) 151 µW/cm² = 1.51 W/m² yellow ( 575 nm - 585 nm) 28.1 µW/cm² = 0.281 W/m² orange ( 585 nm - 650 nm) 75.3 µW/cm² = 0.753 W/m² red ( 650 nm - 780 nm) 72.3 µW/cm² = 0.723 W/m² IRA ( 700 nm - 1400 nm) 36.1 µW/cm² = 0.361 W/m² IR2 ( 720 nm - 1100 nm) 27.1 µW/cm² = 0.271 W/m² IRB ( 1400 nm - 3000 nm) 0 µW/cm² = 0 W/m²
Actionspectra
Erythema 1.83 UV-Index Pyrimidine dimerization of DNA 23.5 µW/cm² Photoceratitis 2.82 µW/cm² Photoconjunctivitis 0.0447 µW/cm² DNA Damage 0.152 Vitamin D3 7.26 µW/cm² Photosynthesis 391 µW/cm² Luminosity 1350 lx Human L-Cone 198 µW/cm² Human M-Cone 176 µW/cm² Human S-Cone 165 µW/cm² CIE X 187 µW/cm² CIE Y 187 µW/cm² CIE Z 299 µW/cm² PAR 2640000 mol photons Extinction preD3 71.2 e-3*m²/mol Extinction Tachysterol 265 e-3*m²/mol Exctincition PreD3 37000 m²/mol Extinction Lumisterol 5.77 m²/mol Exctincition Tachysterol 431000 m²/mol Extinction 7DHC 4.95 m²/mol L-Cone 162 µW/cm² M-Cone 175 µW/cm² S-Cone 304 µW/cm² U-Cone 279 µW/cm² UVR - ICNIRP 2004 1.23 Rel Biol Eff Melatonin Supression 211 µW/cm² Blue Light Hazard 189 µW/cm² (140 µW/cm² per 1000 lx) CIE 174:2006 PreVit D3 7.76 µW/cm² Lumen Reptil 1880 "pseudo-lx" Vitamin D3 Degradation 13.9 µW/cm² Actinic UV 1.23 µW/cm² (9.11 mW/klm) Exctincition Lumisterol 9990 m²/mol Exctincition 7DHC 6730 m²/mol Exctincition Toxisterols 8290 m²/mol
Broadbandmeters
Solarmeter 6.2 (UVB, pre 2010) 94.7 µW/cm² Solarmeter 6.5 (UV-Index, pre 2010) 2.22 Leybold UVB 63.8 µW/cm² Leybold UVA 367 µW/cm² Leybold UVC 0.00269 µW/cm² DeltaOhm UVB 214 µW/cm² DeltaOhm UVC 22.5 µW/cm² Vernier UVB 15.1 µW/cm² Vernier UVA 364 µW/cm² Gröbel UVA 448 µW/cm² Gröbel UVB 28.2 µW/cm² Gröbel UVC -0.022 µW/cm² Luxmeter 1400 lx Solarmeter 6.4 (D3) 6.94 IU/min UVX-31 239 µW/cm² IL UVB 0.0431 µW/cm² IL UVA 400 µW/cm² Solarmeter 6.5 (UVI, post 2010) 1.94 UV-Index Solarmeter 6.2 (UVB, post 2010) 69.8 µW/cm² (Solarmeter Ratio = 36) Solarmeter AlGaN 6.5 UVI sensor 31.5 UV Index GenUV 7.1 UV-Index 1.98 UV-Index Solarmeter 10.0 (Global Power) (manuf.) 8.28 W/m² Solarmeter 4.0 (UVA) 5.13 mW/cm² LS122 (manuf.) 0.00642 W/m² ISM400 (first guess) 4.31 W/m² LS122 (assumption) 0.186 W/m² ISM400_new 3.47 W/m² Solarmeter 10.0 (Global Power) (assumption) 6.58 W/m²