Reptile Lamp Database

Spectrum 424: SW-hci1 Edit
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Full Spectrum

Startup Phase 4

Measurement

Brand Osram
Osram GmbH http://www.osram.de/
Lamp Product Powerball HCI T 70W / NDL 942
Lamp ID SW-hci1 (01/2004)
Spectrometer QE65000
Ballast 70W EVG
Reflector
Distance 0 cm
Age 0 hours
Originator (measurement) Sarina Wunderlich
Database entry created: Sarina Wunderlich 28/Dec/2011 ; updated: Sarina Wunderlich 25/Jul/2023

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 ( 0.42 ; 0.42 ) ( 0.58 ; 0.33 ) ( 0.5 ; 0.29 ; 0.16 )
CCT 3400 Kelvin 3000 Kelvin 3000 Kelvin
distance 0.031 0.015
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) 1520000 µW/cm² = 15200 W/m²
UVC ( 0 nm - 280 nm) 173 µW/cm² = 1.73 W/m²
non-terrestrial ( 0 nm - 290 nm) 191 µW/cm² = 1.91 W/m²
total2 ( 250 nm - 880 nm) 1490000 µW/cm² = 14900 W/m²
UVB (EU) ( 280 nm - 315 nm) 112 µW/cm² = 1.12 W/m²
UVB (US) ( 280 nm - 320 nm) 130 µW/cm² = 1.3 W/m²
UVA+B ( 280 nm - 380 nm) 7380 µW/cm² = 73.8 W/m²
Solar UVB ( 290 nm - 315 nm) 92.2 µW/cm² = 0.922 W/m²
UVA D3 regulating ( 315 nm - 335 nm) 187 µW/cm² = 1.87 W/m²
UVA (EU) ( 315 nm - 380 nm) 7270 µW/cm² = 72.7 W/m²
UVA2 (medical definition) ( 320 nm - 340 nm) 262 µW/cm² = 2.62 W/m²
UVA (US) ( 320 nm - 380 nm) 7250 µW/cm² = 72.5 W/m²
UVA1 (variant) ( 335 nm - 380 nm) 7080 µW/cm² = 70.8 W/m²
UVA1 (medical) ( 340 nm - 400 nm) 15900 µW/cm² = 159 W/m²
vis. UVA ( 350 nm - 380 nm) 6530 µW/cm² = 65.3 W/m²
VIS Rep3 ( 350 nm - 600 nm) 766000 µW/cm² = 7660 W/m²
VIS Rep4 ( 350 nm - 700 nm) 1250000 µW/cm² = 12500 W/m²
purple ( 380 nm - 420 nm) 33700 µW/cm² = 337 W/m²
VIS ( 380 nm - 780 nm) 1380000 µW/cm² = 13800 W/m²
VIS2 ( 400 nm - 680 nm) 1170000 µW/cm² = 11700 W/m²
PAR ( 400 nm - 700 nm) 1230000 µW/cm² = 12300 W/m²
tmp ( 400 nm - 1100 nm) 1510000 µW/cm² = 15100 W/m²
blue ( 420 nm - 490 nm) 151000 µW/cm² = 1510 W/m²
green ( 490 nm - 575 nm) 387000 µW/cm² = 3870 W/m²
yellow ( 575 nm - 585 nm) 50700 µW/cm² = 507 W/m²
orange ( 585 nm - 650 nm) 430000 µW/cm² = 4300 W/m²
red ( 650 nm - 780 nm) 323000 µW/cm² = 3230 W/m²
IRA ( 700 nm - 1400 nm) 275000 µW/cm² = 2750 W/m²
IR2 ( 720 nm - 1100 nm) 235000 µW/cm² = 2350 W/m²
IRB ( 1400 nm - 3000 nm) 0 µW/cm² = 0 W/m²
Actionspectra
Erythema 61.7 UV-Index
Pyrimidine dimerization of DNA 56.5 µW/cm²
Photoceratitis 74.6 µW/cm²
Photoconjunctivitis 110 µW/cm²
DNA Damage 150
Vitamin D3 82 µW/cm²
Photosynthesis 804000 µW/cm²
Luminosity 4160000 lx
Human L-Cone 643000 µW/cm²
Human M-Cone 476000 µW/cm²
Human S-Cone 121000 µW/cm²
CIE X 586000 µW/cm²
CIE Y 580000 µW/cm²
CIE Z 230000 µW/cm²
PAR 5970000000 mol photons
Extinction preD3 1440 e-3*m²/mol
Extinction Tachysterol 3080 e-3*m²/mol
Exctincition PreD3 1110000 m²/mol
Extinction Lumisterol 1070 m²/mol
Exctincition Tachysterol 3810000 m²/mol
Extinction 7DHC 1190 m²/mol
L-Cone 575000 µW/cm²
M-Cone 335000 µW/cm²
S-Cone 189000 µW/cm²
U-Cone 52100 µW/cm²
UVR - ICNIRP 2004 121 Rel Biol Eff
Melatonin Supression 202000 µW/cm²
Blue Light Hazard 140000 µW/cm² (33.6 µW/cm² per 1000 lx)
CIE 174:2006 PreVit D3 84.6 µW/cm²
Lumen Reptil 3060000 "pseudo-lx"
Vitamin D3 Degradation 79.9 µW/cm²
Actinic UV 121 µW/cm² (0.291 mW/klm)
Exctincition Lumisterol 1010000 m²/mol
Exctincition 7DHC 1180000 m²/mol
Exctincition Toxisterols 588000 m²/mol
Broadbandmeters
Solarmeter 6.2 (UVB, pre 2010) 348 µW/cm²
Solarmeter 6.5 (UV-Index, pre 2010) 35.4
Leybold UVB 108 µW/cm²
Leybold UVA 5850 µW/cm²
Leybold UVC 81.2 µW/cm²
DeltaOhm UVB 305 µW/cm²
DeltaOhm UVC 143 µW/cm²
Vernier UVB 75.7 µW/cm²
Vernier UVA 2780 µW/cm²
Gröbel UVA 5940 µW/cm²
Gröbel UVB 117 µW/cm²
Gröbel UVC 89.9 µW/cm²
Luxmeter 4130000 lx
Solarmeter 6.4 (D3) 111 IU/min
UVX-31 569 µW/cm²
IL UVB 0.148 µW/cm²
IL UVA 7100 µW/cm²
Solarmeter 6.5 (UVI, post 2010) 22.4 UV-Index
Solarmeter 6.2 (UVB, post 2010) 135 µW/cm² (Solarmeter Ratio = 6.04)
Solarmeter AlGaN 6.5 UVI sensor 128 UV Index
GenUV 7.1 UV-Index 11.8 UV-Index
Solarmeter 10.0 (Global Power) (manuf.) 18800 W/m²
Solarmeter 4.0 (UVA) 155 mW/cm²
LS122 (manuf.) 390 W/m²
ISM400 (first guess) 16500 W/m²
LS122 (assumption) 1070 W/m²
ISM400_new 15200 W/m²
Solarmeter 10.0 (Global Power) (assumption) 19000 W/m²