Spectrum #850 SW119 (other unbranded 300W self-ballasted mercury vapour lamp) Edit
Delete(1) Raw Measurement
| Lampid | SW119 |
|---|---|
| Spectrometer | USB2000+ |
| Originator | Sarina Wunderlich |
| Ballast | - no ballast or default/unknown ballast - |
| Reflector | - no reflector - |
| Distance | 75 |
| Age | 1 |
created by Sarina Wunderlich, 25.05.2026; last updated by , 25.05.2026
Description
CCT:1019 5027K
CRI DC:1017 0
CRI R01:1002 -10,3 (5027K)
CRI R02:1003 30,7 (5027K)
CRI R03:1004 53,9 (5027K)
CRI R04:1005 31,4 (5027K)
CRI R05:1006 21,3 (5027K)
CRI R06:1007 4,5 (5027K)
CRI R07:1008 18,1 (5027K)
CRI R08:1009 -19,8 (5027K)
CRI R09:1010 -226,1 (5027K)
CRI R10:1011 -55,4 (5027K)
CRI R11:1012 2,5 (5027K)
CRI R12:1013 -16,2 (5027K)
CRI R13:1014 -2,1 (5027K)
CRI R14:1015 75,3 (5027K)
CRI R15:1016 -22,9 (5027K)
CRI Ra:1001 16,2 (5027K)
DC<5.4E-3:1018 false
X:1022 5,05
Y:1023 5,81
Z:1024 3,62
x:1026 0,3486
y:1027 0,4012
z:1028 0,2502
(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 | ( 0.35 ; 0.4 ) | ( 0.18 ; 0.39 ) | ( 0.33 ; 0.12 ; 0.26 ) |
| CCT | 5000 Kelvin | 28000 Kelvin | 5100 Kelvin |
| distance | 0.084 | 0.17 | |
| 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) 1990 µW/cm² = 19.9 W/m² UVC ( 0 nm - 280 nm) 2.68 µW/cm² = 0.0268 W/m² non-terrestrial ( 0 nm - 290 nm) 4.61 µW/cm² = 0.0461 W/m² total2 ( 250 nm - 880 nm) 1960 µW/cm² = 19.6 W/m² UVB (EU) ( 280 nm - 315 nm) 55 µW/cm² = 0.55 W/m² UVB (US) ( 280 nm - 320 nm) 59.2 µW/cm² = 0.592 W/m² UVA+B ( 280 nm - 380 nm) 308 µW/cm² = 3.08 W/m² Solar UVB ( 290 nm - 315 nm) 53.1 µW/cm² = 0.531 W/m² UVA D3 regulating ( 315 nm - 335 nm) 23.9 µW/cm² = 0.239 W/m² UVA (EU) ( 315 nm - 380 nm) 253 µW/cm² = 2.53 W/m² UVA2 (medical definition) ( 320 nm - 340 nm) 24.9 µW/cm² = 0.249 W/m² UVA (US) ( 320 nm - 380 nm) 249 µW/cm² = 2.49 W/m² UVA1 (variant) ( 335 nm - 380 nm) 229 µW/cm² = 2.29 W/m² UVA1 (medical) ( 340 nm - 400 nm) 236 µW/cm² = 2.36 W/m² vis. UVA ( 350 nm - 380 nm) 217 µW/cm² = 2.17 W/m² VIS Rep3 ( 350 nm - 600 nm) 1200 µW/cm² = 12 W/m² VIS Rep4 ( 350 nm - 700 nm) 1370 µW/cm² = 13.7 W/m² purple ( 380 nm - 420 nm) 111 µW/cm² = 1.11 W/m² VIS ( 380 nm - 780 nm) 1350 µW/cm² = 13.5 W/m² VIS2 ( 400 nm - 680 nm) 1100 µW/cm² = 11 W/m² PAR ( 400 nm - 700 nm) 1140 µW/cm² = 11.4 W/m² tmp ( 400 nm - 1100 nm) 1660 µW/cm² = 16.6 W/m² blue ( 420 nm - 490 nm) 228 µW/cm² = 2.28 W/m² green ( 490 nm - 575 nm) 353 µW/cm² = 3.53 W/m² yellow ( 575 nm - 585 nm) 266 µW/cm² = 2.66 W/m² orange ( 585 nm - 650 nm) 97.2 µW/cm² = 0.972 W/m² red ( 650 nm - 780 nm) 299 µW/cm² = 2.99 W/m² IR2 ( 655 nm - 685 nm) 57 µW/cm² = 0.57 W/m² IRA ( 700 nm - 1400 nm) 520 µW/cm² = 5.2 W/m² IRB ( 1400 nm - 3000 nm) 0 µW/cm² = 0 W/m²
(5b) Actionspectra
Erythema 6.66 UV-Index Pyrimidine dimerization of DNA 25.5 µW/cm² Photoceratitis 9.68 µW/cm² Photoconjunctivitis 2.62 µW/cm² DNA Damage 3.9 Vitamin D3 20 µW/cm² Photosynthesis 726 µW/cm² Luminosity 4330 lx Human L-Cone 644 µW/cm² Human M-Cone 546 µW/cm² Human S-Cone 216 µW/cm² CIE X 534 µW/cm² CIE Y 616 µW/cm² CIE Z 382 µW/cm² PAR PPFD 57.5 µmol/m²/s Extinction preD3 111 e-3*m²/mol Extinction Tachysterol 368 e-3*m²/mol Exctincition PreD3 67900 m²/mol Extinction Lumisterol 58.2 m²/mol Exctincition Tachysterol 474000 m²/mol Extinction 7DHC 70.4 m²/mol L-Cone 556 µW/cm² M-Cone 197 µW/cm² S-Cone 441 µW/cm² U-Cone 485 µW/cm² UVR - ICNIRP 2004 8.71 Rel Biol Eff Melatonin Supression 253 µW/cm² Blue Light Hazard 251 µW/cm² (58 µW/cm² per 1000 lx) CIE 174:2006 PreVit D3 20.8 µW/cm² Lumen Reptil 3780 "pseudo-lx" Vitamin D3 Degradation 14.2 µW/cm² Actinic UV 8.56 µW/cm² (19.8 mW/klm) Exctincition Lumisterol 68300 m²/mol Exctincition 7DHC 80600 m²/mol Exctincition Toxisterols 11400 m²/mol UV-Index2 5.27 UV-Index (285-400nm)
(5c) Broadbandmeters
Solarmeter 6.2 (UVB, pre 2010) 68.2 µW/cm² Solarmeter 6.5 (UV-Index, pre 2010) 5.99 Leybold UVB 49.6 µW/cm² Leybold UVA 176 µW/cm² Leybold UVC 1.63 µW/cm² DeltaOhm UVB 66 µW/cm² DeltaOhm UVC 12.3 µW/cm² Vernier UVB 23.2 µW/cm² Vernier UVA 106 µW/cm² Gröbel UVA 223 µW/cm² Gröbel UVB 34.1 µW/cm² Gröbel UVC 1.95 µW/cm² Luxmeter 4650 lx Solarmeter 6.4 (D3) 18.7 IU/min UVX-31 79.2 µW/cm² IL UVB 0.029 µW/cm² IL UVA 231 µW/cm² Solarmeter 6.5 (UVI, post 2010) 4.22 UV-Index Solarmeter 6.2 (UVB, post 2010) 35 µW/cm² (Solarmeter Ratio = 8.28) Solarmeter AlGaN 6.5 UVI sensor 42.4 UV Index GenUV 7.1 UV-Index 2.21 UV-Index Solarmeter 10.0 (Global Power) (manuf.) 21.8 W/m² Solarmeter 4.0 (UVA) 3.13 mW/cm² LS122 (manuf.) 0.66 W/m² ISM400 (first guess) 19.2 W/m² LS122 (assumption) 1.2 W/m² ISM400_new 18.6 W/m² Solarmeter 10.0 (Global Power) (assumption) 21.1 W/m²
(5d) Summary of my favourites
| UVC (0nm -280nm) [µW/cm] | 2.68 | 0.136 % |
| non-terrestrial (0nm -290nm) [µW/cm] | 4.61 | 0.235 % |
| UVB (EU) (280nm -315nm) [µW/cm] | 55 | 2.8 % |
| UVB (US) (280nm -320nm) [µW/cm] | 59.2 | 3.01 % |
| Solar UVB (290nm -315nm) [µW/cm] | 53.1 | 2.7 % |
| UVA (EU) (315nm -380nm) [µW/cm] | 253 | 12.9 % |
| UVA (US) (320nm -380nm) [µW/cm] | 249 | 12.7 % |
| UVA2 (medical definition) (320nm -340nm) [µW/cm] | 24.9 | 1.27 % |
| UVA1 (medical) (340nm -400nm) [µW/cm] | 236 | 12 % |
| UVA D3 regulating (315nm -335nm) [µW/cm] | 23.9 | 1.22 % |
| vis. UVA (350nm -380nm) [µW/cm] | 217 | 11 % |
| VIS (380nm -780nm) [µW/cm] | 1350 | 68.9 % |
| blue (420nm -490nm) [µW/cm] | 228 | 11.6 % |
| total2 (250nm -880nm) [µW/cm] | 1960 | 100 % |
| UV-Index2 [UV-Index] | 5.27 | |
| Luminosity [lx] | 4330 | |
| Blue Light Hazard [µW/cm²] | 251 | 58µW/cm/1000lx |
| Solarmeter 6.5 (UVI, post 2010) [UV-Index] | 4.22 | |
| Solarmeter 6.2 (UVB, post 2010) [µW/cm²] | 35 | |
| Actinic UV [µW/cm²] | 8.56 | 12.4 at UVI7.6 |
| Vitamin D3 [µW/cm²] | 20 | 28.8 at UVI7.6 |