Spectrum #833 SW114 (Reptiles Expert HI-End LED UVA Lampe 35 Watt) Edit
Delete(1) Raw Measurement
| Lampid | SW114 |
|---|---|
| Spectrometer | USB2000+ |
| Originator | Sarina Wunderlich |
| Ballast | - no ballast or default/unknown ballast - |
| Reflector | - no reflector - |
| Distance | 10 |
| Age | 1 |
created by Sarina Wunderlich, 24.01.2026; last updated by Sarina Wunderlich, 24.01.2026
Description
CCT:1019 5338K
CRI DC:1017 0
CRI R01:1002 93,6 (5338K)
CRI R02:1003 90,7 (5338K)
CRI R03:1004 89,3 (5338K)
CRI R04:1005 89,1 (5338K)
CRI R05:1006 92,3 (5338K)
CRI R06:1007 87,8 (5338K)
CRI R07:1008 88,9 (5338K)
CRI R08:1009 91,8 (5338K)
CRI R09:1010 87,5 (5338K)
CRI R10:1011 79,9 (5338K)
CRI R11:1012 91,6 (5338K)
CRI R12:1013 82,0 (5338K)
CRI R13:1014 92,1 (5338K)
CRI R14:1015 94,5 (5338K)
CRI R15:1016 92,6 (5338K)
CRI Ra:1001 90,4 (5338K)
DC<5.4E-3:1018 true
X:1022 100
Y:1023 104
Z:1024 94
x:1026 0
y:1027 0
z:1028 0
(2) Comparison of full spectrum to sunlight
The spectrum is compared to the ASTM spectrum. The measured spectrum is scaled to a lux or UVI value that seems to "make sense" to the database. This can go wrong, depending on the quality and range of the data.
(3) 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 (ASTM spectrum).
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 | ( 0.34 ; 0.35 ) | ( 0.52 ; 0.35 ) | ( 0.32 ; 0.36 ; 0.24 ) |
| CCT | 5300 Kelvin | 3500 Kelvin | 4500 Kelvin |
| distance | 0.036 | 0.072 | |
| colour space | 3-D-graph not implemented yet |
(4) 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 readings of two solarmeters 6.2 (UVB) and 6.5 (UV index) has proven a useful and very simply number to acess the spectral shape in the vitamin-d3-active region.
(5) 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
(5a) Ranges
total ( 0 nm - 0 nm) 31400 µW/cm² = 314 W/m² UVC ( 0 nm - 280 nm) 0.72 µW/cm² = 0.0072 W/m² non-terrestrial ( 0 nm - 290 nm) 4.19 µW/cm² = 0.0419 W/m² total2 ( 250 nm - 880 nm) 31400 µW/cm² = 314 W/m² UVB (EU) ( 280 nm - 315 nm) 19.1 µW/cm² = 0.191 W/m² UVB (US) ( 280 nm - 320 nm) 23.1 µW/cm² = 0.231 W/m² UVA+B ( 280 nm - 380 nm) 100 µW/cm² = 1 W/m² Solar UVB ( 290 nm - 315 nm) 15.7 µW/cm² = 0.157 W/m² UVA D3 regulating ( 315 nm - 335 nm) 14.7 µW/cm² = 0.147 W/m² UVA (EU) ( 315 nm - 380 nm) 81.3 µW/cm² = 0.813 W/m² UVA2 (medical definition) ( 320 nm - 340 nm) 13.8 µW/cm² = 0.138 W/m² UVA (US) ( 320 nm - 380 nm) 77.2 µW/cm² = 0.772 W/m² UVA1 (variant) ( 335 nm - 380 nm) 66.5 µW/cm² = 0.665 W/m² UVA1 (medical) ( 340 nm - 400 nm) 829 µW/cm² = 8.29 W/m² vis. UVA ( 350 nm - 380 nm) 57.5 µW/cm² = 0.575 W/m² VIS Rep3 ( 350 nm - 600 nm) 20600 µW/cm² = 206 W/m² VIS Rep4 ( 350 nm - 700 nm) 29600 µW/cm² = 296 W/m² purple ( 380 nm - 420 nm) 1890 µW/cm² = 18.9 W/m² VIS ( 380 nm - 780 nm) 31100 µW/cm² = 311 W/m² VIS2 ( 400 nm - 680 nm) 27700 µW/cm² = 277 W/m² PAR ( 400 nm - 700 nm) 28800 µW/cm² = 288 W/m² tmp ( 400 nm - 1100 nm) 30500 µW/cm² = 305 W/m² blue ( 420 nm - 490 nm) 7240 µW/cm² = 72.4 W/m² green ( 490 nm - 575 nm) 8850 µW/cm² = 88.5 W/m² yellow ( 575 nm - 585 nm) 1040 µW/cm² = 10.4 W/m² orange ( 585 nm - 650 nm) 6920 µW/cm² = 69.2 W/m² red ( 650 nm - 780 nm) 5120 µW/cm² = 51.2 W/m² IR2 ( 655 nm - 685 nm) 2380 µW/cm² = 23.8 W/m² IRA ( 700 nm - 1400 nm) 1680 µW/cm² = 16.8 W/m² IRB ( 1400 nm - 3000 nm) 0 µW/cm² = 0 W/m²
(5b) Actionspectra
Erythema 5.17 UV-Index Pyrimidine dimerization of DNA 10.2 µW/cm² Photoceratitis 7.54 µW/cm² Photoconjunctivitis 2.09 µW/cm² DNA Damage 3.61 Vitamin D3 12.2 µW/cm² Photosynthesis 20100 µW/cm² Luminosity 81000 lx Human L-Cone 12100 µW/cm² Human M-Cone 10000 µW/cm² Human S-Cone 5300 µW/cm² CIE X 10800 µW/cm² CIE Y 11200 µW/cm² CIE Z 10200 µW/cm² PAR PPFD 1350 µmol/m²/s Extinction preD3 71.2 e-3*m²/mol Extinction Tachysterol 254 e-3*m²/mol Exctincition PreD3 54100 m²/mol Extinction Lumisterol 57.9 m²/mol Exctincition Tachysterol 332000 m²/mol Extinction 7DHC 76.5 m²/mol L-Cone 10400 µW/cm² M-Cone 11600 µW/cm² S-Cone 7810 µW/cm² U-Cone 2730 µW/cm² UVR - ICNIRP 2004 8.27 Rel Biol Eff Melatonin Supression 8850 µW/cm² Blue Light Hazard 6000 µW/cm² (74 µW/cm² per 1000 lx) CIE 174:2006 PreVit D3 12.6 µW/cm² Lumen Reptil 79500 "pseudo-lx" Vitamin D3 Degradation 8.66 µW/cm² Actinic UV 8.21 µW/cm² (1.01 mW/klm) Exctincition Lumisterol 69300 m²/mol Exctincition 7DHC 87200 m²/mol Exctincition Toxisterols 6410 m²/mol
(5c) Broadbandmeters
Solarmeter 6.2 (UVB, pre 2010) 35.6 µW/cm² Solarmeter 6.5 (UV-Index, pre 2010) 4.28 Leybold UVB 17.8 µW/cm² Leybold UVA 126 µW/cm² Leybold UVC 0.937 µW/cm² DeltaOhm UVB 28.4 µW/cm² DeltaOhm UVC 6.48 µW/cm² Vernier UVB 11.5 µW/cm² Vernier UVA 42.4 µW/cm² Gröbel UVA 72.7 µW/cm² Gröbel UVB 16.8 µW/cm² Gröbel UVC 1.58 µW/cm² Luxmeter 81600 lx Solarmeter 6.4 (D3) 13.4 IU/min UVX-31 30.8 µW/cm² IL UVB 0.0147 µW/cm² IL UVA 118 µW/cm² Solarmeter 6.5 (UVI, post 2010) 2.57 UV-Index Solarmeter 6.2 (UVB, post 2010) 15.4 µW/cm² (Solarmeter Ratio = 5.98) Solarmeter AlGaN 6.5 UVI sensor 18 UV Index GenUV 7.1 UV-Index 1.11 UV-Index Solarmeter 10.0 (Global Power) (manuf.) 339 W/m² Solarmeter 4.0 (UVA) 6.77 mW/cm² LS122 (manuf.) 0.28 W/m² ISM400 (first guess) 250 W/m² LS122 (assumption) 12.5 W/m² ISM400_new 209 W/m² Solarmeter 10.0 (Global Power) (assumption) 330 W/m²
(5d) Summary of my favourites
| UVC (0nm -280nm) [µW/cm] | 0.72 | 0.0023 % |
| non-terrestrial (0nm -290nm) [µW/cm] | 4.19 | 0.0134 % |
| UVB (EU) (280nm -315nm) [µW/cm] | 19.1 | 0.061 % |
| UVB (US) (280nm -320nm) [µW/cm] | 23.1 | 0.0738 % |
| Solar UVB (290nm -315nm) [µW/cm] | 15.7 | 0.0499 % |
| UVA (EU) (315nm -380nm) [µW/cm] | 81.3 | 0.259 % |
| UVA (US) (320nm -380nm) [µW/cm] | 77.2 | 0.246 % |
| UVA2 (medical definition) (320nm -340nm) [µW/cm] | 13.8 | 0.044 % |
| UVA1 (medical) (340nm -400nm) [µW/cm] | 829 | 2.64 % |
| UVA D3 regulating (315nm -335nm) [µW/cm] | 14.7 | 0.0469 % |
| vis. UVA (350nm -380nm) [µW/cm] | 57.5 | 0.183 % |
| VIS (380nm -780nm) [µW/cm] | 31100 | 99.1 % |
| blue (420nm -490nm) [µW/cm] | 7240 | 23.1 % |
| total2 (250nm -880nm) [µW/cm] | 31400 | 100 % |
| Erythema [UV-Index] | 5.17 | |
| Luminosity [lx] | 81000 | |
| Blue Light Hazard [µW/cm²] | 6000 | 74µW/cm/1000lx |
| Solarmeter 6.5 (UVI, post 2010) [UV-Index] | 2.57 | |
| Solarmeter 6.2 (UVB, post 2010) [µW/cm²] | 15.4 | |
| Actinic UV [µW/cm²] | 8.21 | 12.1 at UVI7.6 |
| Vitamin D3 [µW/cm²] | 12.2 | 18 at UVI7.6 |