2. Camera scanning (negatives), spectral lighting testing, Dynamic range tests
  3. Spectral analysis of different light sources

Spectrum 5

After determining that my DIY Spectroscope method was imprecise, I got an ArgyllPro ColorMeter measuring system. This is my firs round of measuring various light bulb spectrums and CRIs with it . I used an XRite/Pantone ColorMunki Design spectrometer as the measuring device.
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Built in T2i flash. Holding the measurement button on the ColorMunki
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Built in T2i flash. Holding the measurement button on the ColorMunki

  • Canon 420EX
  • Canon 420EX
  • Canon 420EX. Holding the measurement button on the ColorMunki
  • Built in T2i flash
  • Built in T2i flash
  • Built in T2i flash. Holding the measurement button on the ColorMunki
  • Street light type light on my garage.
  • Street light type light on the garage.
  • WalMart Halogen. Look at that CRI
  • Home Depot daylight balanced CFL. No claim for full spectrum. But it isn't too shabby. For a CFL.
  • WalMart Halogen with one layer of Rosco #3202 tungsten-to-daylight filter. Note that the CRI got worse (it is bumpier now) And there is a lot less Lux.
  • Home Depot 3-way "soft white" CFL. No claims for "full spectrum" and the CRI shows it.
  • Cree TW soft white LED. Highish CRI but note the notch around 580 nm
  • Cree soft white "4-flow" 25 watt (equiv.) LED. No claim for full spectrum.
  • Indoor Sunshine Full Spectrum CFL. That cost over $20 ea.
  • Indoor Sunshine Full Spectrum CFL.
  • Cree daylight 60w (equiv.) LED. No claims for high CRI. (The reason for "Invalid" is because it wasn't in close enough tolerance to the black body locus.
  • Cree daylight 60w (equiv.) LED. No claims for high CRI. (The reason for "Invalid" is because it wasn't in close enough tolerance to the black body locus.
  • Cree warm white 60w (equiv.) LED. No claim for high CRI.
  • Cree warm white 60w LED. No claim for high CRI.
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