File:LED black light flashlight.jpg

Summary

Description
English: A cheap aluminium LED flashlight emitting violet visible light as well as UV-A/black light (probably not below 380 nm though). Can be used for checking bank notes, reading "invisible ink" etc. This specific one was bought to “de-yellow” an old Takumar lens, results can be seen here.
Deutsch: Eine billige LED-Taschenlampe, die Licht im violetten sichtbaren und Schwarzlichtbereich (jedoch vermutlich nicht unter 380 nm) ausstrahlt. Kann zur Überprüfung von Banknoten, zum Lesen "unsichtbarer Tinte" etc. verwendet werden.
Date
Source Own work
Author El Grafo

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Category:CC-BY-SA-4.0#LED%20black%20light%20flashlight.jpg
Category:Self-published work

Quality image

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Category:Quality images#LED%20black%20light%20flashlight.jpg Category:Taken with SMC Pentax-D FA 100mm F2.8 Macro WR Category:Black light Category:LED flashlights Category:Photos by User:El Grafo (studio) Category:Taken with Pentax K-5 Category:Uploaded with VicuñaUploader Category:Quality images by User:El Grafo Category:Reflections Category:Aluminium objects Category:Machined parts Category:Knurling
Category:Aluminium objects Category:Black light Category:CC-BY-SA-4.0 Category:Knurling Category:LED flashlights Category:Machined parts Category:Photos by User:El Grafo (studio) Category:Quality images Category:Quality images by User:El Grafo Category:Reflections Category:Self-published work Category:Taken with Pentax K-5 Category:Taken with SMC Pentax-D FA 100mm F2.8 Macro WR Category:Uploaded with VicuñaUploader