What’s the main difference between the two series? Each has various species, I believe. How to bypass the naming and compare the LEDs by what they can and cannot do in flashlights?
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The SFT-40 is a 5050 sized LED with a Light Emitting Surface a bit bigger. It can also handle more power. Available in 3000k 95CRI.
The SFT-25 is a 3535 sized LED but with a smaller, round LES. Cold CCTs only.
You can read all about in Koef’s reviews…
SFT-25
SFT-40
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The new SFT25R is ideal for throwing far - it is ideal for a dedicated thrower. The tried and true SFT40 and SFT70 compromise on throw a little for more brightness - they are ideal for a more balanced but still throwy light.
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Driven hard the SFT-25R fits where a XP-L or 519A goes and is a good LED with really good candela and decent output. Plus the round die is much easier to focus than a W1 or W2 and works great with smooth reflectors and optics. Tested in the X4 and it’s a hoot!
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SFT25R is a perfect replacement for 519A if you want a more throwy, brighter beam profile.
SFT40 replaces SST40 or old XML2.
The 5000K from KD is nice, similar to SFT40 5000K tint versus 6500K.
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