Spectrum #867 SW137 (Haining Yongre Lighting UVB LED 10.0 10W) Edit
Delete(1) Raw Measurement
| Lampid | SW137 |
|---|---|
| Spectrometer | USB2000+ |
| Originator | Sarina Wunderlich |
| Ballast | - no ballast or default/unknown ballast - |
| Reflector | - no reflector - |
| Distance | 10 |
| Age | 0 |
created by Sarina Wunderlich, 14.10.2026; last updated by , 14.10.2026
Description
(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 | ( 0.31 ; 0.27 ) | ( 0.22 ; 0.29 ) | ( 0.17 ; 0.19 ; 0.24 ) |
| CCT | 7500 Kelvin | 22000 Kelvin | 11000 Kelvin |
| distance | 0.029 | 0.054 | |
| 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) 2860 µW/cm² = 28.6 W/m² UVC ( 0 nm - 280 nm) 0.134 µW/cm² = 0.00134 W/m² non-terrestrial ( 0 nm - 290 nm) 0.769 µW/cm² = 0.00769 W/m² total2 ( 250 nm - 880 nm) 2860 µW/cm² = 28.6 W/m² UVB (EU) ( 280 nm - 315 nm) 325 µW/cm² = 3.25 W/m² UVB (US) ( 280 nm - 320 nm) 430 µW/cm² = 4.3 W/m² UVA+B ( 280 nm - 380 nm) 1230 µW/cm² = 12.3 W/m² Solar UVB ( 290 nm - 315 nm) 324 µW/cm² = 3.24 W/m² UVA D3 regulating ( 315 nm - 335 nm) 248 µW/cm² = 2.48 W/m² UVA (EU) ( 315 nm - 380 nm) 908 µW/cm² = 9.08 W/m² UVA2 (medical definition) ( 320 nm - 340 nm) 170 µW/cm² = 1.7 W/m² UVA (US) ( 320 nm - 380 nm) 802 µW/cm² = 8.02 W/m² UVA1 (variant) ( 335 nm - 380 nm) 660 µW/cm² = 6.6 W/m² UVA1 (medical) ( 340 nm - 400 nm) 683 µW/cm² = 6.83 W/m² vis. UVA ( 350 nm - 380 nm) 560 µW/cm² = 5.6 W/m² VIS Rep3 ( 350 nm - 600 nm) 1660 µW/cm² = 16.6 W/m² VIS Rep4 ( 350 nm - 700 nm) 2110 µW/cm² = 21.1 W/m² purple ( 380 nm - 420 nm) 59.7 µW/cm² = 0.597 W/m² VIS ( 380 nm - 780 nm) 1620 µW/cm² = 16.2 W/m² VIS2 ( 400 nm - 680 nm) 1450 µW/cm² = 14.5 W/m² PAR ( 400 nm - 700 nm) 1500 µW/cm² = 15 W/m² blue ( 420 nm - 490 nm) 521 µW/cm² = 5.21 W/m² green ( 490 nm - 575 nm) 386 µW/cm² = 3.86 W/m² yellow ( 575 nm - 585 nm) 51.9 µW/cm² = 0.519 W/m² orange ( 585 nm - 650 nm) 367 µW/cm² = 3.67 W/m² tmp ( 600 nm - 1000 nm) 529 µW/cm² = 5.29 W/m² red ( 650 nm - 780 nm) 233 µW/cm² = 2.33 W/m² IR2 ( 655 nm - 685 nm) 110 µW/cm² = 1.1 W/m² IRA ( 700 nm - 1400 nm) 73.8 µW/cm² = 0.738 W/m² IRB ( 1400 nm - 3000 nm) 0 µW/cm² = 0 W/m²
(5b) Actionspectra
Erythema 24.5 UV-Index Pyrimidine dimerization of DNA 211 µW/cm² Photoceratitis 38.2 µW/cm² Photoconjunctivitis 0.881 µW/cm² DNA Damage 2.9 Vitamin D3 111 µW/cm² Photosynthesis 1100 µW/cm² Luminosity 3870 lx Human L-Cone 586 µW/cm² Human M-Cone 468 µW/cm² Human S-Cone 429 µW/cm² CIE X 611 µW/cm² CIE Y 530 µW/cm² CIE Z 825 µW/cm² PAR PPFD 68.5 µmol/m²/s Extinction preD3 541 e-3*m²/mol Extinction Tachysterol 1830 e-3*m²/mol Exctincition PreD3 241000 m²/mol Extinction Lumisterol 118 m²/mol Exctincition Tachysterol 2360000 m²/mol Extinction 7DHC 105 m²/mol L-Cone 506 µW/cm² M-Cone 540 µW/cm² S-Cone 699 µW/cm² U-Cone 1160 µW/cm² UVR - ICNIRP 2004 21.2 Rel Biol Eff Melatonin Supression 559 µW/cm² Blue Light Hazard 458 µW/cm² (118 µW/cm² per 1000 lx) CIE 174:2006 PreVit D3 126 µW/cm² Lumen Reptil 5570 "pseudo-lx" Vitamin D3 Degradation 87.5 µW/cm² Actinic UV 20.9 µW/cm² (54 mW/klm) Exctincition Lumisterol 159000 m²/mol Exctincition 7DHC 134000 m²/mol Exctincition Toxisterols 28200 m²/mol UV-Index2 24.4 UV-Index (285-400nm)
(5c) Broadbandmeters
Solarmeter 6.2 (UVB, pre 2010) 470 µW/cm² Solarmeter 6.5 (UV-Index, pre 2010) 31.3 Leybold UVB 367 µW/cm² Leybold UVA 476 µW/cm² Leybold UVC -0.0689 µW/cm² DeltaOhm UVB 511 µW/cm² DeltaOhm UVC 80.4 µW/cm² Vernier UVB 184 µW/cm² Vernier UVA 493 µW/cm² Gröbel UVA 692 µW/cm² Gröbel UVB 221 µW/cm² Gröbel UVC -0.0501 µW/cm² Luxmeter 3860 lx Solarmeter 6.4 (D3) 97.9 IU/min UVX-31 560 µW/cm² IL UVB 0.192 µW/cm² IL UVA 677 µW/cm² Solarmeter 6.5 (UVI, post 2010) 25.1 UV-Index Solarmeter 6.2 (UVB, post 2010) 271 µW/cm² (Solarmeter Ratio = 10.8) Solarmeter AlGaN 6.5 UVI sensor 287 UV Index GenUV 7.1 UV-Index 14.5 UV-Index Solarmeter 10.0 (Global Power) (manuf.) 22.3 W/m² Solarmeter 4.0 (UVA) 9.7 mW/cm² LS122 (manuf.) 0.0104 W/m² ISM400 (first guess) 12.9 W/m² LS122 (assumption) 0.606 W/m² ISM400_new 10.5 W/m² Solarmeter 10.0 (Global Power) (assumption) 18.8 W/m²
(5d) Summary of my favourites
| UVC (0nm -280nm) [µW/cm] | 0.134 | 0.00469 % |
| non-terrestrial (0nm -290nm) [µW/cm] | 0.769 | 0.0269 % |
| UVB (EU) (280nm -315nm) [µW/cm] | 325 | 11.4 % |
| UVB (US) (280nm -320nm) [µW/cm] | 430 | 15 % |
| Solar UVB (290nm -315nm) [µW/cm] | 324 | 11.3 % |
| UVA (EU) (315nm -380nm) [µW/cm] | 908 | 31.7 % |
| UVA (US) (320nm -380nm) [µW/cm] | 802 | 28.1 % |
| UVA2 (medical definition) (320nm -340nm) [µW/cm] | 170 | 5.94 % |
| UVA1 (medical) (340nm -400nm) [µW/cm] | 683 | 23.9 % |
| UVA D3 regulating (315nm -335nm) [µW/cm] | 248 | 8.67 % |
| vis. UVA (350nm -380nm) [µW/cm] | 560 | 19.6 % |
| VIS (380nm -780nm) [µW/cm] | 1620 | 56.6 % |
| blue (420nm -490nm) [µW/cm] | 521 | 18.2 % |
| total2 (250nm -880nm) [µW/cm] | 2860 | 100 % |
| UV-Index2 [UV-Index] | 24.4 | |
| Luminosity [lx] | 3870 | |
| Blue Light Hazard [µW/cm²] | 458 | 118µW/cm/1000lx |
| Solarmeter 6.5 (UVI, post 2010) [UV-Index] | 25.1 | |
| Solarmeter 6.2 (UVB, post 2010) [µW/cm²] | 271 | |
| Actinic UV [µW/cm²] | 20.9 | 6.53 at UVI7.6 |
| Vitamin D3 [µW/cm²] | 111 | 34.8 at UVI7.6 |