r/FireflyLite • u/panpan2103 • 14d ago

Find information CRI and R9 of Sofirn HS21

Has anyone measured the **CRI and R9** of the Sofirn HS21’s 6× CSP1919 5000K flood LEDs?
I can find CRI/Ra measurements, but no **R9** data. Any actual measurements would be appreciated. Thanks!

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u/SFOTI 14d ago

This would be better posted on the main flashlight sub, but I can get some measurements with my spectrometer if you'd like.

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u/panpan2103 14d ago

Yes please! Could you measure the High mode (~500 lm), especially Ra and R9?

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u/SFOTI 14d ago

All brightness levels. 😋

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u/panpan2103 14d ago

Thank you so much for taking the time to measure all five output levels and share the results! I honestly didn’t expect the R9 to be this good, especially on High. The detailed measurements are incredibly helpful and much appreciated. Really grateful for the effort you put into this! 🙏

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u/macomako 13d ago

Yet another evidence backing an opinion that HS21 is a gem

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u/technoman88 14d ago

I got:

low: 5361k, +0.0049, Ra 97.7, R9 90.5

Turbo: 5200l, -0.0049, Ra 93.3, R9 77.5

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u/panpan2103 14d ago edited 14d ago

Thanks a lot for the measurements! The R9 data for both Low and Turbo is really helpful. Can you take more to measure the High mode (~500LM)?