CCT:1019 12002K
CRI DC:1017 7.93E-3
CRI R01:1002 25.2 (12002K)
CRI R02:1003 30.7 (12002K)
CRI R03:1004 41.0 (12002K)
CRI R04:1005 36.6 (12002K)
CRI R05:1006 33.6 (12002K)
CRI R06:1007 32.9 (12002K)
CRI R07:1008 27.7 (12002K)
CRI R08:1009 17.2 (12002K)
CRI R09:1010 42.2 (12002K)
CRI R10:1011 19.1 (12002K)
CRI R11:1012 50.9 (12002K)
CRI R12:1013 60.8 (12002K)
CRI R13:1014 1.2 (12002K)
CRI R14:1015 61.3 (12002K)
CRI R15:1016 21.1 (12002K)
CRI Ra:1001 30.6 (12002K)
DC<5.4E-3:1018 false
Spectrum 605: RS-Z4-24W Edit
DeleteMeasurement
| Brand |
Reptile Systems French brand, originally for aqaristics https://www.aquariumsystems.fr/ |
|---|---|
| Lamp Product |
Reptile Systems Zone 4 (15%) 24W 15% UVB |
| Lamp ID |
RS-Z4-24W (07/2022) Reptile Systems Zone 4 (15%) - 24W |
| 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.)
23/Aug/2022 ; updated:
Thomas Griffiths (Tomaskas Ltd.)
9/Jan/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 | ( 0.27 ; 0.27 ) | ( 0.23 ; 0.45 ) | ( 0.18 ; 0.19 ; 0.37 ) |
| CCT | 12000 Kelvin | 11000 Kelvin | 11000 Kelvin |
| distance | 0.13 | 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) 1420 µW/cm² = 14.2 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) 1420 µW/cm² = 14.2 W/m² UVB (EU) ( 280 nm - 315 nm) 357 µW/cm² = 3.57 W/m² UVB (US) ( 280 nm - 320 nm) 376 µW/cm² = 3.76 W/m² UVA+B ( 280 nm - 380 nm) 554 µW/cm² = 5.54 W/m² Solar UVB ( 290 nm - 315 nm) 357 µW/cm² = 3.57 W/m² UVA D3 regulating ( 315 nm - 335 nm) 64.8 µW/cm² = 0.648 W/m² UVA (EU) ( 315 nm - 380 nm) 197 µW/cm² = 1.97 W/m² UVA2 (medical definition) ( 320 nm - 340 nm) 58.1 µW/cm² = 0.581 W/m² UVA (US) ( 320 nm - 380 nm) 178 µW/cm² = 1.78 W/m² UVA1 (variant) ( 335 nm - 380 nm) 132 µW/cm² = 1.32 W/m² UVA1 (medical) ( 340 nm - 400 nm) 159 µW/cm² = 1.59 W/m² vis. UVA ( 350 nm - 380 nm) 97.5 µW/cm² = 0.975 W/m² VIS Rep3 ( 350 nm - 600 nm) 779 µW/cm² = 7.79 W/m² VIS Rep4 ( 350 nm - 700 nm) 921 µW/cm² = 9.21 W/m² purple ( 380 nm - 420 nm) 134 µW/cm² = 1.34 W/m² VIS ( 380 nm - 780 nm) 853 µW/cm² = 8.53 W/m² PAR ( 400 nm - 700 nm) 785 µW/cm² = 7.85 W/m² blue ( 420 nm - 490 nm) 274 µW/cm² = 2.74 W/m² green ( 490 nm - 575 nm) 210 µW/cm² = 2.1 W/m² yellow ( 575 nm - 585 nm) 41.8 µW/cm² = 0.418 W/m² orange ( 585 nm - 650 nm) 100 µW/cm² = 1 W/m² red ( 650 nm - 780 nm) 93 µW/cm² = 0.93 W/m² IRA ( 700 nm - 1400 nm) 42.8 µW/cm² = 0.428 W/m² IRB ( 1400 nm - 3000 nm) 0 µW/cm² = 0 W/m²
Actionspectra
Erythema 9.41 UV-Index Pyrimidine dimerization of DNA 137 µW/cm² Photoceratitis 21.8 µW/cm² Photoconjunctivitis 0.136 µW/cm² DNA Damage 0.592 Vitamin D3 51.3 µW/cm² Photosynthesis 568 µW/cm² Luminosity 1900 lx Human L-Cone 278 µW/cm² Human M-Cone 249 µW/cm² Human S-Cone 247 µW/cm² CIE X 267 µW/cm² CIE Y 263 µW/cm² CIE Z 442 µW/cm² PAR 3870000 mol photons Extinction preD3 370 e-3*m²/mol Extinction Tachysterol 1210 e-3*m²/mol Exctincition PreD3 155000 m²/mol Extinction Lumisterol 29.4 m²/mol Exctincition Tachysterol 1550000 m²/mol Extinction 7DHC 16.8 m²/mol L-Cone 228 µW/cm² M-Cone 233 µW/cm² S-Cone 467 µW/cm² U-Cone 329 µW/cm² UVR - ICNIRP 2004 5.42 Rel Biol Eff Melatonin Supression 310 µW/cm² Blue Light Hazard 284 µW/cm² (150 µW/cm² per 1000 lx) CIE 174:2006 PreVit D3 53 µW/cm² Lumen Reptil 2630 "pseudo-lx" Vitamin D3 Degradation 64.8 µW/cm² Actinic UV 5.45 µW/cm² (28.6 mW/klm) Exctincition Lumisterol 52200 m²/mol Exctincition 7DHC 29100 m²/mol Exctincition Toxisterols 21200 m²/mol
Broadbandmeters
Solarmeter 6.2 (UVB, pre 2010) 372 µW/cm² Solarmeter 6.5 (UV-Index, pre 2010) 13 Leybold UVB 316 µW/cm² Leybold UVA 123 µW/cm² Leybold UVC 0.00919 µW/cm² DeltaOhm UVB 378 µW/cm² DeltaOhm UVC 59.1 µW/cm² Vernier UVB 128 µW/cm² Vernier UVA 259 µW/cm² Gröbel UVA 240 µW/cm² Gröbel UVB 165 µW/cm² Gröbel UVC -0.135 µW/cm² Solarmeter 6.4 (D3) 40.5 IU/min UVX-31 419 µW/cm² IL UVB 0.139 µW/cm² IL UVA 178 µW/cm² Solarmeter 6.5 (UVI, post 2010) 12.5 UV-Index Solarmeter 6.2 (UVB, post 2010) 215 µW/cm² (Solarmeter Ratio = 17.2) Solarmeter AlGaN 6.5 UVI sensor 253 UV Index GenUV 7.1 UV-Index 12.3 UV-Index Solarmeter 10.0 (Global Power) 10.4 W/m² Solarmeter 4.0 (UVA) 2.91 mW/cm² LS122 0.0151 W/m² ISM400 5.67 W/m²