Spectrum #866 SW135 (Zoo Med Reptisun 10.0 UVB T5 24W) Edit
Delete(1) Raw Measurement
| Lampid | SW135 |
|---|---|
| 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 4771K
CRI DC:1017 7,13E-3
CRI R01:1002 87,5 (4771K)
CRI R02:1003 84,9 (4771K)
CRI R03:1004 37,8 (4771K)
CRI R04:1005 78,8 (4771K)
CRI R05:1006 75,0 (4771K)
CRI R06:1007 51,2 (4771K)
CRI R07:1008 59,9 (4771K)
CRI R08:1009 64,6 (4771K)
CRI R09:1010 17,2 (4771K)
CRI R10:1011 21,6 (4771K)
CRI R11:1012 62,6 (4771K)
CRI R12:1013 30,3 (4771K)
CRI R13:1014 91,5 (4771K)
CRI R14:1015 60,2 (4771K)
CRI R15:1016 95,0 (4771K)
CRI Ra:1001 67,5 (4771K)
DC<5.4E-3:1018 false
X:1022 10,74
Y:1023 10,48
Z:1024 9,48
x:1026 0,3499
y:1027 0,3415
z:1028 0,3086
(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) 7630 µW/cm² = 76.3 W/m² UVC ( 0 nm - 280 nm) 25.9 µW/cm² = 0.259 W/m² non-terrestrial ( 0 nm - 290 nm) 33.1 µW/cm² = 0.331 W/m² total2 ( 250 nm - 880 nm) 7630 µW/cm² = 76.3 W/m² UVB (EU) ( 280 nm - 315 nm) 533 µW/cm² = 5.33 W/m² UVB (US) ( 280 nm - 320 nm) 856 µW/cm² = 8.56 W/m² UVA+B ( 280 nm - 380 nm) 4900 µW/cm² = 49 W/m² Solar UVB ( 290 nm - 315 nm) 526 µW/cm² = 5.26 W/m² UVA D3 regulating ( 315 nm - 335 nm) 1460 µW/cm² = 14.6 W/m² UVA (EU) ( 315 nm - 380 nm) 4370 µW/cm² = 43.7 W/m² UVA2 (medical definition) ( 320 nm - 340 nm) 1580 µW/cm² = 15.8 W/m² UVA (US) ( 320 nm - 380 nm) 4050 µW/cm² = 40.5 W/m² UVA1 (variant) ( 335 nm - 380 nm) 2910 µW/cm² = 29.1 W/m² UVA1 (medical) ( 340 nm - 400 nm) 2650 µW/cm² = 26.5 W/m² vis. UVA ( 350 nm - 380 nm) 1530 µW/cm² = 15.3 W/m² VIS Rep3 ( 350 nm - 600 nm) 3580 µW/cm² = 35.8 W/m² VIS Rep4 ( 350 nm - 700 nm) 4170 µW/cm² = 41.7 W/m² purple ( 380 nm - 420 nm) 433 µW/cm² = 4.33 W/m² VIS ( 380 nm - 780 nm) 2700 µW/cm² = 27 W/m² VIS2 ( 400 nm - 680 nm) 2450 µW/cm² = 24.5 W/m² PAR ( 400 nm - 700 nm) 2470 µW/cm² = 24.7 W/m² blue ( 420 nm - 490 nm) 640 µW/cm² = 6.4 W/m² green ( 490 nm - 575 nm) 735 µW/cm² = 7.35 W/m² yellow ( 575 nm - 585 nm) 140 µW/cm² = 1.4 W/m² orange ( 585 nm - 650 nm) 633 µW/cm² = 6.33 W/m² tmp ( 600 nm - 1000 nm) 653 µW/cm² = 6.53 W/m² red ( 650 nm - 780 nm) 115 µW/cm² = 1.15 W/m² IR2 ( 655 nm - 685 nm) 31.9 µW/cm² = 0.319 W/m² IRA ( 700 nm - 1400 nm) 61.6 µW/cm² = 0.616 W/m² IRB ( 1400 nm - 3000 nm) 0 µW/cm² = 0 W/m²
(5b) Actionspectra
Erythema 45.9 UV-Index Pyrimidine dimerization of DNA 331 µW/cm² Photoceratitis 63.7 µW/cm² Photoconjunctivitis 24.4 µW/cm² DNA Damage 30.3 Vitamin D3 149 µW/cm² Photosynthesis 1640 µW/cm² Luminosity 8090 lx Human L-Cone 1230 µW/cm² Human M-Cone 971 µW/cm² Human S-Cone 571 µW/cm² CIE X 1160 µW/cm² CIE Y 1130 µW/cm² CIE Z 1020 µW/cm² PAR PPFD 124 µmol/m²/s Extinction preD3 1180 e-3*m²/mol Extinction Tachysterol 3830 e-3*m²/mol Exctincition PreD3 691000 m²/mol Extinction Lumisterol 354 m²/mol Exctincition Tachysterol 5520000 m²/mol Extinction 7DHC 380 m²/mol L-Cone 1050 µW/cm² M-Cone 553 µW/cm² S-Cone 1140 µW/cm² U-Cone 2260 µW/cm² UVR - ICNIRP 2004 50.5 Rel Biol Eff Melatonin Supression 711 µW/cm² Blue Light Hazard 703 µW/cm² (86.9 µW/cm² per 1000 lx) CIE 174:2006 PreVit D3 163 µW/cm² Lumen Reptil 9940 "pseudo-lx" Vitamin D3 Degradation 176 µW/cm² Actinic UV 50.2 µW/cm² (62 mW/klm) Exctincition Lumisterol 428000 m²/mol Exctincition 7DHC 425000 m²/mol Exctincition Toxisterols 195000 m²/mol UV-Index2 34.1 UV-Index (285-400nm)
(5c) Broadbandmeters
Solarmeter 6.2 (UVB, pre 2010) 1060 µW/cm² Solarmeter 6.5 (UV-Index, pre 2010) 44.8 Leybold UVB 738 µW/cm² Leybold UVA 3020 µW/cm² Leybold UVC 19.8 µW/cm² DeltaOhm UVB 1860 µW/cm² DeltaOhm UVC 237 µW/cm² Vernier UVB 255 µW/cm² Vernier UVA 2940 µW/cm² Gröbel UVA 3720 µW/cm² Gröbel UVB 385 µW/cm² Gröbel UVC 20.7 µW/cm² Luxmeter 8210 lx Solarmeter 6.4 (D3) 140 IU/min UVX-31 2100 µW/cm² IL UVB 0.461 µW/cm² IL UVA 3360 µW/cm² Solarmeter 6.5 (UVI, post 2010) 37 UV-Index Solarmeter 6.2 (UVB, post 2010) 701 µW/cm² (Solarmeter Ratio = 19) Solarmeter AlGaN 6.5 UVI sensor 463 UV Index GenUV 7.1 UV-Index 26.8 UV-Index Solarmeter 10.0 (Global Power) (manuf.) 46.9 W/m² Solarmeter 4.0 (UVA) 42.8 mW/cm² LS122 (manuf.) 0.0117 W/m² ISM400 (first guess) 19.6 W/m² LS122 (assumption) 0.932 W/m² ISM400_new 14.8 W/m² Solarmeter 10.0 (Global Power) (assumption) 34 W/m²
(5d) Summary of my favourites
| UVC (0nm -280nm) [µW/cm] | 25.9 | 0.34 % |
| non-terrestrial (0nm -290nm) [µW/cm] | 33.1 | 0.433 % |
| UVB (EU) (280nm -315nm) [µW/cm] | 533 | 6.98 % |
| UVB (US) (280nm -320nm) [µW/cm] | 856 | 11.2 % |
| Solar UVB (290nm -315nm) [µW/cm] | 526 | 6.89 % |
| UVA (EU) (315nm -380nm) [µW/cm] | 4370 | 57.3 % |
| UVA (US) (320nm -380nm) [µW/cm] | 4050 | 53 % |
| UVA2 (medical definition) (320nm -340nm) [µW/cm] | 1580 | 20.6 % |
| UVA1 (medical) (340nm -400nm) [µW/cm] | 2650 | 34.7 % |
| UVA D3 regulating (315nm -335nm) [µW/cm] | 1460 | 19.1 % |
| vis. UVA (350nm -380nm) [µW/cm] | 1530 | 20.1 % |
| VIS (380nm -780nm) [µW/cm] | 2700 | 35.3 % |
| blue (420nm -490nm) [µW/cm] | 640 | 8.38 % |
| total2 (250nm -880nm) [µW/cm] | 7630 | 100 % |
| UV-Index2 [UV-Index] | 34.1 | |
| Luminosity [lx] | 8090 | |
| Blue Light Hazard [µW/cm²] | 703 | 86.9µW/cm/1000lx |
| Solarmeter 6.5 (UVI, post 2010) [UV-Index] | 37 | |
| Solarmeter 6.2 (UVB, post 2010) [µW/cm²] | 701 | |
| Actinic UV [µW/cm²] | 50.2 | 11.2 at UVI7.6 |
| Vitamin D3 [µW/cm²] | 149 | 33.2 at UVI7.6 |