Fluorescent Lamps:
ZooMed Reptisun 2.0 / NatureSun T8
 
broadband meter readings  
iso-irradiance charts
spectrum - UV + Visible light
spectral analysis - photobiologically active UV

 

 

 

Lamp index :

Lamp Description

ZooMed Reptisun 2.0 - rebranded in 2011 as ZooMed NatureSun
18watt, 600mm (24in), T8 (diameter 26mm- 1in) fluorescent tube
ZooMed Laboratories, Inc., San Luis Obispo, CA USA

Ballast fixture: standard Arcadia 240v magnetic ballast for 18watt fluorescent tubes
Reflector: Arcadia T8 600mm (24in) aluminium reflector

Lamp ref: BZ16 (2008)

Broadband Meter Readings

 
UV Index (Solarmeter 6.5) Total UVB (Solarmeter 6.2) and Illuminance (Lux meter readings)
New lamp (108hrs use) No reflector fitted                Distance from midpoint of lamp surface (cm)
15
20
25
30
35
40
45
50
55
60
UV Index
0.1
0.1
0
0
0
0
0
0
0
0
Total UVB (W/cm)
5
4
3
2
2
1
1
1
1
0
lux
2,080
1,520
1,200
925
752
615
518
441
381
333
With Arcadia aluminium reflector
UV Index
0.2
0.1
0.1
0.1
0.1
0
0
0
0
0
Total UVB (W/cm)
9
7
5
4
3
2
2
2
1
1
lux
5,060
3,560
2,680
2,080
1,660
1,350
1,140
948
820
709

 

Longevity
no figures available
Electrical consumption (includes magnetic ballast) 26 watts
Colorimetry (from spectral data)
CCT (human eye) 8,676K
CRI (Ra) (human eye 92.7

Iso-Irradiance Charts       
Not prepared for this lamp owing to very low UVB output

Spectrum - UV plus Visible Light

Spectrum - UV in more detail

This spectrum has:

  • no detectable UVC or non-terrestrial UVB (wavelengths below 290nm).
  • only very low UVB and short-wavelength UVA output (wavelengths 290 - 350nm).
  • low long-wavelength UVA output (wavelengths 350 - 400nm) - reptile vision includes long-wavelength UVA.
  • fairly low but continuous spectrum visible light (wavelengths 400 - 750nm) between the mercury vapour emission "spikes" - this improves colour rendering to the reptile eye - plus triphosphor peaks in blue, green and red wavelengths - this improves colour rendering to the human eye.

Spectral Analysis - photobiologically active UV (wavelengths from 270 - 350nm)

  • UVB is present in the wavelengths which enable vitamin D3 synthesis in skin (although the actual output is very low, as already stated).
  • This lamp emits no hazardous UVC or non-terrestrial UVB (below 290nm).
  • Since there is virtually no UVB below 310nm, the risk of DNA damage is even less than for natural sunlight.
      

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