CCT:1019 7905K
CRI DC:1017 8,70E-3
CRI R01:1002 75,2 (7905K)
CRI R02:1003 71,4 (7905K)
CRI R03:1004 66,3 (7905K)
CRI R04:1005 74,2 (7905K)
CRI R05:1006 76,5 (7905K)
CRI R06:1007 68,6 (7905K)
CRI R07:1008 77,3 (7905K)
CRI R08:1009 72,1 (7905K)
CRI R09:1010 -7,2 (7905K)
CRI R10:1011 29,8 (7905K)
CRI R11:1012 78,0 (7905K)
CRI R12:1013 51,8 (7905K)
CRI R13:1014 69,3 (7905K)
CRI R14:1015 79,6 (7905K)
CRI R15:1016 69,6 (7905K)
CRI Ra:1001 72,7 (7905K)
DC<5.4E-3:1018 false
X:1022 1,67
Y:1023 1,66
Z:1024 2,25
x:1026 0,2985
y:1027 0,2980
z:1028 0,4035
Spectrum 824: SW108 Edit
DeleteMeasurement
| Brand |
Exo Terra Rolf C. Hagen Inc. http://www.hagen.com/ |
|---|---|
| Lamp Product |
TerraSky UV Spot 3W PT2425 |
| Lamp ID |
SW108 (05/2025) provided for test by a Dendrobate keeper |
| Spectrometer | USB2000+ |
| Ballast | - no ballast or default/unknown ballast - |
| Reflector | |
| Distance | 30 cm |
| Age | 30 hours |
| Originator (measurement) | Sarina Wunderlich |
Database entry created:
Sarina Wunderlich
30/May/2025 ; updated:
Sarina Wunderlich
30/May/2025
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 | ( 0.3 ; 0.3 ) | ( 0.13 ; 0.33 ) | ( 0.14 ; 0.11 ; 0.29 ) |
| CCT | 7900 Kelvin | 0 Kelvin | 0 Kelvin |
| distance | 0 | 0 | |
| 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) 796 µW/cm² = 7.96 W/m² UVC ( 0 nm - 280 nm) 0 µW/cm² = 0 W/m² non-terrestrial ( 0 nm - 290 nm) 0.275 µW/cm² = 0.00275 W/m² total2 ( 250 nm - 880 nm) 796 µW/cm² = 7.96 W/m² UVB (EU) ( 280 nm - 315 nm) 24.2 µW/cm² = 0.242 W/m² UVB (US) ( 280 nm - 320 nm) 28.7 µW/cm² = 0.287 W/m² UVA+B ( 280 nm - 380 nm) 36.5 µW/cm² = 0.365 W/m² Solar UVB ( 290 nm - 315 nm) 23.9 µW/cm² = 0.239 W/m² UVA D3 regulating ( 315 nm - 335 nm) 8.05 µW/cm² = 0.0805 W/m² UVA (EU) ( 315 nm - 380 nm) 12.3 µW/cm² = 0.123 W/m² UVA2 (medical definition) ( 320 nm - 340 nm) 3.89 µW/cm² = 0.0389 W/m² UVA (US) ( 320 nm - 380 nm) 7.8 µW/cm² = 0.078 W/m² UVA1 (variant) ( 335 nm - 380 nm) 4.2 µW/cm² = 0.042 W/m² UVA1 (medical) ( 340 nm - 400 nm) 172 µW/cm² = 1.72 W/m² vis. UVA ( 350 nm - 380 nm) 3.56 µW/cm² = 0.0356 W/m² VIS Rep3 ( 350 nm - 600 nm) 684 µW/cm² = 6.84 W/m² VIS Rep4 ( 350 nm - 700 nm) 756 µW/cm² = 7.56 W/m² purple ( 380 nm - 420 nm) 371 µW/cm² = 3.71 W/m² VIS ( 380 nm - 780 nm) 758 µW/cm² = 7.58 W/m² VIS2 ( 400 nm - 680 nm) 580 µW/cm² = 5.8 W/m² PAR ( 400 nm - 700 nm) 584 µW/cm² = 5.84 W/m² tmp ( 400 nm - 1100 nm) 591 µW/cm² = 5.91 W/m² blue ( 420 nm - 490 nm) 126 µW/cm² = 1.26 W/m² green ( 490 nm - 575 nm) 140 µW/cm² = 1.4 W/m² yellow ( 575 nm - 585 nm) 19.1 µW/cm² = 0.191 W/m² orange ( 585 nm - 650 nm) 78.2 µW/cm² = 0.782 W/m² red ( 650 nm - 780 nm) 24.5 µW/cm² = 0.245 W/m² IRA ( 700 nm - 1400 nm) 7.02 µW/cm² = 0.0702 W/m² IR2 ( 720 nm - 1100 nm) 4.17 µW/cm² = 0.0417 W/m² IRB ( 1400 nm - 3000 nm) 0 µW/cm² = 0 W/m²
Actionspectra
Erythema 2.35 UV-Index Pyrimidine dimerization of DNA 16 µW/cm² Photoceratitis 3.6 µW/cm² Photoconjunctivitis 0.127 µW/cm² DNA Damage 0.396 Vitamin D3 9.96 µW/cm² Photosynthesis 393 µW/cm² Luminosity 1290 lx Human L-Cone 191 µW/cm² Human M-Cone 164 µW/cm² Human S-Cone 147 µW/cm² CIE X 179 µW/cm² CIE Y 179 µW/cm² CIE Z 242 µW/cm² PAR PPFD 32.1 µmol/m²/s Extinction preD3 42.3 e-3*m²/mol Extinction Tachysterol 143 e-3*m²/mol Exctincition PreD3 19600 m²/mol Extinction Lumisterol 13.1 m²/mol Exctincition Tachysterol 181000 m²/mol Extinction 7DHC 13.1 m²/mol L-Cone 158 µW/cm² M-Cone 131 µW/cm² S-Cone 332 µW/cm² U-Cone 529 µW/cm² UVR - ICNIRP 2004 2.27 Rel Biol Eff Melatonin Supression 220 µW/cm² Blue Light Hazard 187 µW/cm² (145 µW/cm² per 1000 lx) CIE 174:2006 PreVit D3 11.2 µW/cm² Lumen Reptil 2370 "pseudo-lx" Vitamin D3 Degradation 6.38 µW/cm² Actinic UV 2.24 µW/cm² (17.4 mW/klm) Exctincition Lumisterol 16600 m²/mol Exctincition 7DHC 16300 m²/mol Exctincition Toxisterols 2090 m²/mol
Broadbandmeters
Solarmeter 6.2 (UVB, pre 2010) 31.5 µW/cm² Solarmeter 6.5 (UV-Index, pre 2010) 2.82 Leybold UVB 24.9 µW/cm² Leybold UVA 18.2 µW/cm² Leybold UVC 0.00579 µW/cm² DeltaOhm UVB 27.4 µW/cm² DeltaOhm UVC 4.94 µW/cm² Vernier UVB 14.7 µW/cm² Vernier UVA 13 µW/cm² Gröbel UVA 11.6 µW/cm² Gröbel UVB 16.9 µW/cm² Gröbel UVC 0.00784 µW/cm² Luxmeter 1340 lx Solarmeter 6.4 (D3) 8.8 IU/min UVX-31 30.4 µW/cm² IL UVB 0.0131 µW/cm² IL UVA 13.2 µW/cm² Solarmeter 6.5 (UVI, post 2010) 2.16 UV-Index Solarmeter 6.2 (UVB, post 2010) 16.4 µW/cm² (Solarmeter Ratio = 7.61) Solarmeter AlGaN 6.5 UVI sensor 21.5 UV Index GenUV 7.1 UV-Index 1.07 UV-Index Solarmeter 10.0 (Global Power) (manuf.) 6.19 W/m² Solarmeter 4.0 (UVA) 1.37 mW/cm² LS122 (manuf.) 0.000729 W/m² ISM400 (first guess) 3.25 W/m² LS122 (assumption) 0.139 W/m² ISM400_new 2.44 W/m² Solarmeter 10.0 (Global Power) (assumption) 5.2 W/m²