Reptile Lamp Database

Spectrum 593: SW24 Edit
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Full Spectrum

CCT:1019 6925K
CRI DC:1017 1,42E-3
CRI R01:1002 91,5 (6925K)
CRI R02:1003 92,8 (6925K)
CRI R03:1004 75,6 (6925K)
CRI R04:1005 89,9 (6925K)
CRI R05:1006 92,7 (6925K)
CRI R06:1007 86,9 (6925K)
CRI R07:1008 82,7 (6925K)
CRI R08:1009 78,3 (6925K)
CRI R09:1010 53,2 (6925K)
CRI R10:1011 75,7 (6925K)
CRI R11:1012 98,0 (6925K)
CRI R12:1013 93,0 (6925K)
CRI R13:1014 89,2 (6925K)
CRI R14:1015 83,7 (6925K)
CRI R15:1016 97,3 (6925K)
CRI Ra:1001 86,3 (6925K)
DC<5.4E-3:1018 true
X:1022 3,40
Y:1023 3,55
Z:1024 4,14
x:1026 0,3068
y:1027 0,3203
z:1028 0,3729

Measurement

Brand Sylvania
Sylvania http://www.sylvania-lamps.com/
Lamp Product Activa 172 18W
Lamp ID SW24 (02/2022)
purchased from Leuchtmittelmarkt.com 17.02.2022
Spectrometer USB2000+
Ballast - no ballast or default/unknown ballast -
Reflector
Distance 20 cm
Age 10 hours
Originator (measurement) Sarina Wunderlich
Database entry created: Sarina Wunderlich 26/Feb/2022 ; updated: Sarina Wunderlich 26/Feb/2022

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.

Spectrum in the visible wavelength range

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 (id 1).

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, 338451, 511513 ), 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 ; 0.32 ) ( 0.41 ; 0.43 ) ( 0.26 ; 0.3 ; 0.32 )
CCT 6900 Kelvin 4900 Kelvin 5400 Kelvin
distance 0.09 0.074
colour space 3-D-graph not implemented yet

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.

Spectrum in the vitamin D3 active wavelength range

The ratio of the two solarmeters 6.2 (UVB) and 6.5 (UV index) readings has proven a useful and very simply number to acess the spectral shape in the vitamin-d3-active region.

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
then any Solarmeter 6.2 reading multiplied with 0.7 (0.7=13.8/19.6) is an estimate of UVB irradiance for this specific lamp. If you do so, always make sure, that the calculated (effective) irradiance is valid. The calculated value is not valid, if the lamp's spectrum is not measured in the relevant range.

Ranges
total ( 0 nm - 0 nm) 1020 µW/cm² = 10.2 W/m²
UVC ( 0 nm - 280 nm) 0.632 µW/cm² = 0.00632 W/m²
non-terrestrial ( 0 nm - 290 nm) 1.24 µW/cm² = 0.0124 W/m²
total2 ( 250 nm - 880 nm) 1020 µW/cm² = 10.2 W/m²
UVB (EU) ( 280 nm - 315 nm) 6.61 µW/cm² = 0.0661 W/m²
UVB (US) ( 280 nm - 320 nm) 7.25 µW/cm² = 0.0725 W/m²
UVA+B ( 280 nm - 380 nm) 46.3 µW/cm² = 0.463 W/m²
Solar UVB ( 290 nm - 315 nm) 6 µW/cm² = 0.06 W/m²
UVA D3 regulating ( 315 nm - 335 nm) 3.16 µW/cm² = 0.0316 W/m²
UVA (EU) ( 315 nm - 380 nm) 39.7 µW/cm² = 0.397 W/m²
UVA2 (medical definition) ( 320 nm - 340 nm) 3.36 µW/cm² = 0.0336 W/m²
UVA (US) ( 320 nm - 380 nm) 39.1 µW/cm² = 0.391 W/m²
UVA1 (variant) ( 335 nm - 380 nm) 36.5 µW/cm² = 0.365 W/m²
UVA1 (medical) ( 340 nm - 400 nm) 51.4 µW/cm² = 0.514 W/m²
vis. UVA ( 350 nm - 380 nm) 33.9 µW/cm² = 0.339 W/m²
VIS Rep3 ( 350 nm - 600 nm) 780 µW/cm² = 7.8 W/m²
VIS Rep4 ( 350 nm - 700 nm) 966 µW/cm² = 9.66 W/m²
purple ( 380 nm - 420 nm) 71.2 µW/cm² = 0.712 W/m²
VIS ( 380 nm - 780 nm) 958 µW/cm² = 9.58 W/m²
PAR ( 400 nm - 700 nm) 916 µW/cm² = 9.16 W/m²
blue ( 420 nm - 490 nm) 295 µW/cm² = 2.95 W/m²
green ( 490 nm - 575 nm) 311 µW/cm² = 3.11 W/m²
yellow ( 575 nm - 585 nm) 31.8 µW/cm² = 0.318 W/m²
orange ( 585 nm - 650 nm) 198 µW/cm² = 1.98 W/m²
red ( 650 nm - 780 nm) 51.1 µW/cm² = 0.511 W/m²
IRA ( 700 nm - 1400 nm) 45.7 µW/cm² = 0.457 W/m²
IRB ( 1400 nm - 3000 nm) 0 µW/cm² = 0 W/m²
Actionspectra
Erythema 0.949 UV-Index
Pyrimidine dimerization of DNA 2.53 µW/cm²
Photoceratitis 1.39 µW/cm²
Photoconjunctivitis 0.536 µW/cm²
DNA Damage 0.871
Vitamin D3 2.18 µW/cm²
Photosynthesis 634 µW/cm²
Luminosity 2760 lx
Human L-Cone 408 µW/cm²
Human M-Cone 351 µW/cm²
Human S-Cone 239 µW/cm²
CIE X 366 µW/cm²
CIE Y 382 µW/cm²
CIE Z 444 µW/cm²
PAR 4230000 mol photons
Extinction preD3 16.4 e-3*m²/mol
Extinction Tachysterol 55.7 e-3*m²/mol
Exctincition PreD3 11400 m²/mol
Extinction Lumisterol 11.6 m²/mol
Exctincition Tachysterol 72000 m²/mol
Extinction 7DHC 15 m²/mol
L-Cone 333 µW/cm²
M-Cone 381 µW/cm²
S-Cone 402 µW/cm²
U-Cone 151 µW/cm²
UVR - ICNIRP 2004 1.56 Rel Biol Eff
Melatonin Supression 344 µW/cm²
Blue Light Hazard 268 µW/cm² (97 µW/cm² per 1000 lx)
CIE 174:2006 PreVit D3 2.21 µW/cm²
Lumen Reptil 2930 "pseudo-lx"
Vitamin D3 Degradation 2.2 µW/cm²
Actinic UV 1.54 µW/cm² (5.59 mW/klm)
Exctincition Lumisterol 13600 m²/mol
Exctincition 7DHC 16900 m²/mol
Exctincition Toxisterols 1120 m²/mol
Broadbandmeters
Solarmeter 6.2 (UVB, pre 2010) 9.05 µW/cm²
Solarmeter 6.5 (UV-Index, pre 2010) 0.819
Leybold UVB 5.61 µW/cm²
Leybold UVA 28 µW/cm²
Leybold UVC 0.211 µW/cm²
DeltaOhm UVB 8.44 µW/cm²
DeltaOhm UVC 1.71 µW/cm²
Vernier UVB 2.63 µW/cm²
Vernier UVA 16.6 µW/cm²
Gröbel UVA 33.1 µW/cm²
Gröbel UVB 4.09 µW/cm²
Gröbel UVC 0.359 µW/cm²
Solarmeter 6.4 (D3) 2.56 IU/min
UVX-31 10.1 µW/cm²
IL UVB 0.00374 µW/cm²
IL UVA 36.5 µW/cm²
Solarmeter 6.5 (UVI, post 2010) 0.494 UV-Index
Solarmeter 6.2 (UVB, post 2010) 4.52 µW/cm² (Solarmeter Ratio = 9.15)
Solarmeter AlGaN 6.5 UVI sensor 5.14 UV Index
GenUV 7.1 UV-Index 0.279 UV-Index
Solarmeter 10.0 (Global Power) 10 W/m²
Solarmeter 4.0 (UVA) 0.629 mW/cm²
LS122 0.0927 W/m²
ISM400 6.66 W/m²