Ffl351a 4000k vs sft40 3000k

[BigJerm]

Which emitter would have more lumens and which one would be more efficient? I’m wanting to do an emitter swap on a baton 4 and I’m not sure which one would be better.

[ebastler (Moritz)]

Koef3 tested both, they seem to perform mostly the same:

LED test / review - Luminus SFT-40 3000/6500 K - warm white thrower LED with good tint and perfect light

LED Test / review EN Luminus Specialty White SFT-40 2023-10-24 The Luminus SFT-40 has been on the market for some time now. Available only in cool white light color at launch, a warm white variant with high color rendering was also available for a short time, which indeed makes this emitter special, as it combines high luminance with good light quality and warm light color at the same time. The cool white SFT-40 was purchased from Mouser in November 2022, while the warm white SFT-4…

LED test / review - Fireflylite FFL351A (3700 K, 95 CRI) - the rosy allrounder

LED Test / review EN Fireflylite FFL351A (3700 K, 95 CRI) 2024-05-09 For some time now, Fireflylite has been offering special, customized emitters. Some of these are used in their flashlights. The FFL351A is an emitter in 3535 format without a dome, with high color rendering and - according to reports - a slight red tint (“rosy”). The LED tested here was provided to me by German flashlight forum (TLF) user @Palladin. Many thanks for this at this point! Technical data Tj --- …

SFT40 has slightly more throw, but apart from that they seem to be similar.

[BigJerm]

Excellent! Thank you very much.

[QReciprocity42]

Given that they are similar in performance, I’d go for the one what matches the footprint of the stock emitter, 3535 or 5050. Otherwise there are centering and focus issues to deal with.