FL 1 Standard (?)
18h
38lm
40m (range)
400cd (?)

OK, so FL 1 is the "ANSI FL1 Standard" ("FL" is
"flashlight", I take it) and cd is "candela".
I suppose one has to read the article [1] to
learn what sense to make of the
400cd specification.

[1] http://www.led-resource.com/ansi-fl1-standard/

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