this post was submitted on 20 Jul 2023

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flashlight

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Red vs Green filter compass legibility comparison (fediverse.krohsnest.com)

submitted 1 year ago* (last edited 1 year ago) by [email protected] to c/flashlight

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Nitecore 25mm filters on a Streamlight 2L-X (w/usb rechargable battery) on low, which is 40 lumens. White light was from a desk lamp.

If anyone knows how to make multiple photos show on a post let me know haha

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[–] jerv 4 points 1 year ago (1 children)

And now we know why the military uses so much green light....

[–] [email protected] 2 points 1 year ago* (last edited 1 year ago)

A big part of it has to do with running night vision. On aircraft what used to be red lighting is now NVIS friendly green. My limited understanding is that it is within a range of the light spectrum that can be seen by the naked eye (obviously) but prevents glare/bloom when seen through night vision.