Spectrum #865 SW136 (Zoo Med Reptisun 10.0 UVB T5 24W) Edit
Delete(1) Raw Measurement
| Lampid | SW136 |
|---|---|
| Spectrometer | USB 2000 |
| Originator | Sarina Wunderlich |
| Ballast | - no ballast or default/unknown ballast - |
| Reflector | Arcadia ProT5 HO T5 UV-B Lighting Kit |
| Distance | 10 |
| Age | 0.5 |
created by Sarina Wunderlich, 11.10.2026; last updated by , 11.10.2026
Description
CCT:1019 4826K
CRI DC:1017 8,18E-3
CRI R01:1002 89,5 (4826K)
CRI R02:1003 87,0 (4826K)
CRI R03:1004 39,5 (4826K)
CRI R04:1005 78,6 (4826K)
CRI R05:1006 74,8 (4826K)
CRI R06:1007 51,4 (4826K)
CRI R07:1008 60,5 (4826K)
CRI R08:1009 66,5 (4826K)
CRI R09:1010 22,1 (4826K)
CRI R10:1011 25,1 (4826K)
CRI R11:1012 62,6 (4826K)
CRI R12:1013 31,6 (4826K)
CRI R13:1014 94,0 (4826K)
CRI R14:1015 61,3 (4826K)
CRI R15:1016 93,9 (4826K)
CRI Ra:1001 68,5 (4826K)
DC<5.4E-3:1018 false
X:1022 11,25
Y:1023 10,93
Z:1024 10,14
x:1026 0,3481
y:1027 0,3381
z:1028 0,3138
(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 ; 0.34 ) | ( 0.14 ; 0.29 ) | ( 0.21 ; 0.11 ; 0.23 ) |
| CCT | 4800 Kelvin | 0 Kelvin | 14000 Kelvin |
| distance | 0 | 0.13 | |
| 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) 7890 µW/cm² = 78.9 W/m² UVC ( 0 nm - 280 nm) 33.3 µW/cm² = 0.333 W/m² non-terrestrial ( 0 nm - 290 nm) 41.3 µW/cm² = 0.413 W/m² total2 ( 250 nm - 880 nm) 7890 µW/cm² = 78.9 W/m² UVB (EU) ( 280 nm - 315 nm) 546 µW/cm² = 5.46 W/m² UVB (US) ( 280 nm - 320 nm) 876 µW/cm² = 8.76 W/m² UVA+B ( 280 nm - 380 nm) 5030 µW/cm² = 50.3 W/m² Solar UVB ( 290 nm - 315 nm) 538 µW/cm² = 5.38 W/m² UVA D3 regulating ( 315 nm - 335 nm) 1500 µW/cm² = 15 W/m² UVA (EU) ( 315 nm - 380 nm) 4490 µW/cm² = 44.9 W/m² UVA2 (medical definition) ( 320 nm - 340 nm) 1620 µW/cm² = 16.2 W/m² UVA (US) ( 320 nm - 380 nm) 4160 µW/cm² = 41.6 W/m² UVA1 (variant) ( 335 nm - 380 nm) 2990 µW/cm² = 29.9 W/m² UVA1 (medical) ( 340 nm - 400 nm) 2720 µW/cm² = 27.2 W/m² vis. UVA ( 350 nm - 380 nm) 1580 µW/cm² = 15.8 W/m² VIS Rep3 ( 350 nm - 600 nm) 3710 µW/cm² = 37.1 W/m² VIS Rep4 ( 350 nm - 700 nm) 4320 µW/cm² = 43.2 W/m² purple ( 380 nm - 420 nm) 449 µW/cm² = 4.49 W/m² VIS ( 380 nm - 780 nm) 2800 µW/cm² = 28 W/m² VIS2 ( 400 nm - 680 nm) 2540 µW/cm² = 25.4 W/m² PAR ( 400 nm - 700 nm) 2560 µW/cm² = 25.6 W/m² blue ( 420 nm - 490 nm) 673 µW/cm² = 6.73 W/m² green ( 490 nm - 575 nm) 759 µW/cm² = 7.59 W/m² yellow ( 575 nm - 585 nm) 146 µW/cm² = 1.46 W/m² orange ( 585 nm - 650 nm) 653 µW/cm² = 6.53 W/m² tmp ( 600 nm - 1000 nm) 695 µW/cm² = 6.95 W/m² red ( 650 nm - 780 nm) 121 µW/cm² = 1.21 W/m² IR2 ( 655 nm - 685 nm) 33.4 µW/cm² = 0.334 W/m² IRA ( 700 nm - 1400 nm) 83.4 µW/cm² = 0.834 W/m² IRB ( 1400 nm - 3000 nm) 0 µW/cm² = 0 W/m²
(5b) Actionspectra
Erythema 50.2 UV-Index Pyrimidine dimerization of DNA 338 µW/cm² Photoceratitis 67.9 µW/cm² Photoconjunctivitis 31.5 µW/cm² DNA Damage 37.9 Vitamin D3 154 µW/cm² Photosynthesis 1700 µW/cm² Luminosity 8360 lx Human L-Cone 1270 µW/cm² Human M-Cone 1000 µW/cm² Human S-Cone 602 µW/cm² CIE X 1200 µW/cm² CIE Y 1170 µW/cm² CIE Z 1080 µW/cm² PAR PPFD 129 µmol/m²/s Extinction preD3 1270 e-3*m²/mol Extinction Tachysterol 4030 e-3*m²/mol Exctincition PreD3 769000 m²/mol Extinction Lumisterol 411 m²/mol Exctincition Tachysterol 5780000 m²/mol Extinction 7DHC 445 m²/mol L-Cone 1080 µW/cm² M-Cone 574 µW/cm² S-Cone 1200 µW/cm² U-Cone 2330 µW/cm² UVR - ICNIRP 2004 57 Rel Biol Eff Melatonin Supression 746 µW/cm² Blue Light Hazard 739 µW/cm² (88.3 µW/cm² per 1000 lx) CIE 174:2006 PreVit D3 168 µW/cm² Lumen Reptil 10300 "pseudo-lx" Vitamin D3 Degradation 182 µW/cm² Actinic UV 56.6 µW/cm² (67.7 mW/klm) Exctincition Lumisterol 488000 m²/mol Exctincition 7DHC 491000 m²/mol Exctincition Toxisterols 238000 m²/mol UV-Index2 35.3 UV-Index (285-400nm)
(5c) Broadbandmeters
Solarmeter 6.2 (UVB, pre 2010) 1100 µW/cm² Solarmeter 6.5 (UV-Index, pre 2010) 46.3 Leybold UVB 756 µW/cm² Leybold UVA 3100 µW/cm² Leybold UVC 26.4 µW/cm² DeltaOhm UVB 1910 µW/cm² DeltaOhm UVC 249 µW/cm² Vernier UVB 261 µW/cm² Vernier UVA 3020 µW/cm² Gröbel UVA 3820 µW/cm² Gröbel UVB 395 µW/cm² Gröbel UVC 27.1 µW/cm² Luxmeter 8480 lx Solarmeter 6.4 (D3) 145 IU/min UVX-31 2150 µW/cm² IL UVB 0.474 µW/cm² IL UVA 3450 µW/cm² Solarmeter 6.5 (UVI, post 2010) 38.5 UV-Index Solarmeter 6.2 (UVB, post 2010) 720 µW/cm² (Solarmeter Ratio = 18.7) Solarmeter AlGaN 6.5 UVI sensor 474 UV Index GenUV 7.1 UV-Index 27.7 UV-Index Solarmeter 10.0 (Global Power) (manuf.) 48.8 W/m² Solarmeter 4.0 (UVA) 44 mW/cm² LS122 (manuf.) 0.059 W/m² ISM400 (first guess) 20.7 W/m² LS122 (assumption) 1 W/m² ISM400_new 15.8 W/m² Solarmeter 10.0 (Global Power) (assumption) 35.5 W/m²
(5d) Summary of my favourites
| UVC (0nm -280nm) [µW/cm] | 33.3 | 0.422 % |
| non-terrestrial (0nm -290nm) [µW/cm] | 41.3 | 0.524 % |
| UVB (EU) (280nm -315nm) [µW/cm] | 546 | 6.92 % |
| UVB (US) (280nm -320nm) [µW/cm] | 876 | 11.1 % |
| Solar UVB (290nm -315nm) [µW/cm] | 538 | 6.82 % |
| UVA (EU) (315nm -380nm) [µW/cm] | 4490 | 56.9 % |
| UVA (US) (320nm -380nm) [µW/cm] | 4160 | 52.7 % |
| UVA2 (medical definition) (320nm -340nm) [µW/cm] | 1620 | 20.5 % |
| UVA1 (medical) (340nm -400nm) [µW/cm] | 2720 | 34.5 % |
| UVA D3 regulating (315nm -335nm) [µW/cm] | 1500 | 19 % |
| vis. UVA (350nm -380nm) [µW/cm] | 1580 | 20 % |
| VIS (380nm -780nm) [µW/cm] | 2800 | 35.5 % |
| blue (420nm -490nm) [µW/cm] | 673 | 8.53 % |
| total2 (250nm -880nm) [µW/cm] | 7890 | 100 % |
| UV-Index2 [UV-Index] | 35.3 | |
| Luminosity [lx] | 8360 | |
| Blue Light Hazard [µW/cm²] | 739 | 88.3µW/cm/1000lx |
| Solarmeter 6.5 (UVI, post 2010) [UV-Index] | 38.5 | |
| Solarmeter 6.2 (UVB, post 2010) [µW/cm²] | 720 | |
| Actinic UV [µW/cm²] | 56.6 | 12.2 at UVI7.6 |
| Vitamin D3 [µW/cm²] | 154 | 33.1 at UVI7.6 |