Whats a good Budget UV Throwing flashlight , how far will a UV flashlight ...light?

LED Flashlights – General Info 18650 Flashlights
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Thanks for the links Keltex, im also looking for UV-drop in.
Preferably, ill just buy the emitter and make it myself. Anyone know where those are sold?

DX also sell one.

Review on the one from MF.

Anyone know which is better or the difference? Im leaning towards the one from MF.