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Difference in R12 values of NorthLux 5000 bulbs and the Absolute Series 5000 strip
I was interested in purchasing a high CRI solution for a studio and noticed that there is a really big difference in R12 values between the NorthLux 5000 bulbs and the Absolute Series 5000 strip. Why is there such a big difference and what wavelength does R12 correspond to?
Depending on the underlying technology used, the R12 value can vary quite significantly.
The R12 value corresponds to wavelengths centered at approximately 460 nm. The reason our 95 CRI products (such as our NorthLux lamps) have a lower R12 value is that they utilize a blue diode as its light engine, which creates some distortion at or around the peak blue wavelength around 450-460 nm. On the other hand, our ABSOLUTE SERIES LEDs use a violet diode as its light engine, which does not create as much distortion in the blue wavelength range as it has a peak violet wavelength of approximately 420 nm.
We generally do not find that R12 is as critical of a color metric as R9 is, but for a color-critical studio application, the added color rendering benefit may be of interest to you.
For further reference, we would recommend the following resources:
- CRI/Ra test color samples (TCS), section titled "TCS 12"
- ABSOLUTE SERIES™ NEW SPECTRUM LED TECHNOLOGY, reference the first spectral diagram next to section titled "What's Different With ABSOLUTE™?"
Are there any issues with UV light from using the violet Diode?
Based on a strict definition of "UV" being wavelengths less than 400 nm, our ABSOLUTE SERIES LEDs do not contain any UV.
From a purely technical perspective, however, the violet wavelengths do contain a higher amount of energy, and may present a slightly higher risk. Depending on how sensitive the artwork pieces and materials are, you may want to keep that in mind.
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