Warm white mini compact lamp sold as a 10%UVB lamp for tortoises
Spectrum 515: BHH12 Edit
DeleteMeasurement
| Brand |
Chinese manufacturer |
|---|---|
| Lamp Product |
Mini Compact Coil Warm white compact lamp |
| Lamp ID |
BHH12 (01/2015) Warm white mini compact lamp sold as a 10% UVB lamp for tortoises |
| Spectrometer | USB2000+ (2) |
| Ballast | - no ballast or default/unknown ballast - |
| Reflector | |
| Distance | 10 cm |
| Age | 100 hours |
| Originator (measurement) | Frances Baines |
Database entry created:
Frances Baines
11/Jan/2015 ; updated:
Frances Baines
11/Jan/2015
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.
WARNING: The measurement range (350 - 800 nm) is not sufficient for this evaluation! Data is only available in the range 250.23 - 750.24 nm. Results are shown anyway but should be ignored by anyone except experts.
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, 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 | ( 0.45 ; 0.4 ) | ( 0.38 ; 0.42 ) | ( 0.51 ; 0.19 ; 0.21 ) |
| CCT | 2800 Kelvin | 5300 Kelvin | 2900 Kelvin |
| distance | 0.077 | 0.12 | |
| 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.
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
Ranges
total ( 0 nm - 0 nm) 700 µW/cm² = 7 W/m² UVC ( 0 nm - 280 nm) 0 µW/cm² = 0 W/m² non-terrestrial ( 0 nm - 290 nm) 0 µW/cm² = 0 W/m² total2 ( 250 nm - 880 nm) 700 µW/cm² = 7 W/m² UVB (EU) ( 280 nm - 315 nm) 0.654 µW/cm² = 0.00654 W/m² UVB (US) ( 280 nm - 320 nm) 0.654 µW/cm² = 0.00654 W/m² UVA+B ( 280 nm - 380 nm) 17.5 µW/cm² = 0.175 W/m² Solar UVB ( 290 nm - 315 nm) 0.654 µW/cm² = 0.00654 W/m² UVA D3 regulating ( 315 nm - 335 nm) 0.223 µW/cm² = 0.00223 W/m² UVA (EU) ( 315 nm - 380 nm) 16.8 µW/cm² = 0.168 W/m² UVA2 (medical definition) ( 320 nm - 340 nm) 0.236 µW/cm² = 0.00236 W/m² UVA (US) ( 320 nm - 380 nm) 16.8 µW/cm² = 0.168 W/m² UVA1 (variant) ( 335 nm - 380 nm) 16.6 µW/cm² = 0.166 W/m² UVA1 (medical) ( 340 nm - 400 nm) 18.4 µW/cm² = 0.184 W/m² vis. UVA ( 350 nm - 380 nm) 16.4 µW/cm² = 0.164 W/m² VIS Rep3 ( 350 nm - 600 nm) 403 µW/cm² = 4.03 W/m² VIS Rep4 ( 350 nm - 700 nm) 679 µW/cm² = 6.79 W/m² purple ( 380 nm - 420 nm) 31.6 µW/cm² = 0.316 W/m² VIS ( 380 nm - 780 nm) 682 µW/cm² = 6.82 W/m² VIS2 ( 400 nm - 680 nm) 653 µW/cm² = 6.53 W/m² PAR ( 400 nm - 700 nm) 661 µW/cm² = 6.61 W/m² tmp ( 400 nm - 1100 nm) 681 µW/cm² = 6.81 W/m² blue ( 420 nm - 490 nm) 89.9 µW/cm² = 0.899 W/m² green ( 490 nm - 575 nm) 195 µW/cm² = 1.95 W/m² yellow ( 575 nm - 585 nm) 27 µW/cm² = 0.27 W/m² orange ( 585 nm - 650 nm) 296 µW/cm² = 2.96 W/m² red ( 650 nm - 780 nm) 42.8 µW/cm² = 0.428 W/m² IRA ( 700 nm - 1400 nm) 19.8 µW/cm² = 0.198 W/m² IR2 ( 720 nm - 1100 nm) 0.181 µW/cm² = 0.00181 W/m² IRB ( 1400 nm - 3000 nm) 0 µW/cm² = 0 W/m²
Actionspectra
Erythema 0.0129 UV-Index Pyrimidine dimerization of DNA 0.189 µW/cm² Photoceratitis 0.0294 µW/cm² Photoconjunctivitis 0 µW/cm² DNA Damage 0.000228 Vitamin D3 0.0538 µW/cm² Photosynthesis 418 µW/cm² Luminosity 2500 lx Human L-Cone 395 µW/cm² Human M-Cone 269 µW/cm² Human S-Cone 75.4 µW/cm² CIE X 390 µW/cm² CIE Y 348 µW/cm² CIE Z 137 µW/cm² PAR 3300000 mol photons Extinction preD3 0.55 e-3*m²/mol Extinction Tachysterol 1.84 e-3*m²/mol Exctincition PreD3 243 m²/mol Extinction Lumisterol 0.00923 m²/mol Exctincition Tachysterol 2430 m²/mol Extinction 7DHC 0 m²/mol L-Cone 356 µW/cm² M-Cone 131 µW/cm² S-Cone 143 µW/cm² U-Cone 67.8 µW/cm² UVR - ICNIRP 2004 0.00577 Rel Biol Eff Melatonin Supression 105 µW/cm² Blue Light Hazard 87.1 µW/cm² (34.8 µW/cm² per 1000 lx) CIE 174:2006 PreVit D3 0.0523 µW/cm² Lumen Reptil 1840 "pseudo-lx" Vitamin D3 Degradation 0.103 µW/cm² Actinic UV 0.00579 µW/cm² (0.0232 mW/klm) Exctincition Lumisterol 48.3 m²/mol Exctincition 7DHC 12.8 m²/mol Exctincition Toxisterols 37.5 m²/mol
Broadbandmeters
Solarmeter 6.2 (UVB, pre 2010) 0.684 µW/cm² Solarmeter 6.5 (UV-Index, pre 2010) 0.0146 Leybold UVB 0.524 µW/cm² Leybold UVA 11.9 µW/cm² Leybold UVC 0 µW/cm² DeltaOhm UVB 0.721 µW/cm² DeltaOhm UVC 0.0941 µW/cm² Vernier UVB 0.16 µW/cm² Vernier UVA 5.34 µW/cm² Gröbel UVA 14.3 µW/cm² Gröbel UVB 0.254 µW/cm² Gröbel UVC -0.000325 µW/cm² Luxmeter 2410 lx Solarmeter 6.4 (D3) 0.0456 IU/min UVX-31 1.31 µW/cm² IL UVB 0.00027 µW/cm² IL UVA 15.9 µW/cm² Solarmeter 6.5 (UVI, post 2010) 0.0149 UV-Index Solarmeter 6.2 (UVB, post 2010) 0.359 µW/cm² (Solarmeter Ratio = 24.1) Solarmeter AlGaN 6.5 UVI sensor 0.392 UV Index GenUV 7.1 UV-Index 0.0228 UV-Index Solarmeter 10.0 (Global Power) (manuf.) 7.74 W/m² Solarmeter 4.0 (UVA) 0.255 mW/cm² LS122 (manuf.) 0 W/m² ISM400 (first guess) 5.69 W/m² LS122 (assumption) 0.341 W/m² ISM400_new 4.65 W/m² Solarmeter 10.0 (Global Power) (assumption) 7.69 W/m²