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Falco:The beam from a 21W Darkbuster is not as focused as the tightest setting on my Salvo 21W, it also has a shorter burn time. It's a rather big handheld underwater light, it's pretty comparable in size to a UK D8.
subzero:Thanks for the feedback. I'd much prefer using getting the Salvo, but I don't really know where to attach batteries on my Zeagle Ranger.