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#124119 - 11/20/09 01:38 PM Re: Flashlights and Filters [Re: Subie Love]
Boomer Offline
member

Registered: 10/21/09
Posts: 98
Loc: Minnesota,USA
i was there this summer and i saw the moose too! my and my brother went up to the pass between little/big cottonwood canyon and also cecret lake.
_________________________
Modern civilized man, sated with artificialities and luxury, were wont, when he returns to the primeval mountains, to find among their caves his prehistoric brother, alive and unchanged. -Guido Rey

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#125256 - 12/15/09 11:30 AM Re: Flashlights and Filters [Re: Boomer]
Otis Hiker Offline
member

Registered: 12/12/09
Posts: 24
Loc: MA
Like said before red is ultimate for not impairing your nighttime vision.
I have a buddy that goes to a maritime academy and they are required to have a flashlight that either has a red filter or red led's. They require it because of the effect that red lights will have on your eyes (not making your pupils get smaller) so that they don't have to adjust while on ship at night.
Ever since he told me that I've been buying headlamps that only have red led's in them.

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#125314 - 12/15/09 11:16 PM Re: Flashlights and Filters [Re: Otis Hiker]
tylernt Offline


Registered: 12/13/08
Posts: 4
There is some debate on the red for night vision thing. Everybody jumped on red light because it can be used while processing camera film, but there is evidence supporting blueish-green (505nm to 510nm) as a superior night-vision color because you can see as well with a only a tiny amount of bluegreen light than you can with a whole bunch more red light.

Some also say that it's not necessarily the color that preserves night vision but the overall brightness. So, if you use an extremely dim white light, supposedly your night vision won't be any more compromised than it would be with a brighter red or bluegreen one.

Now, for flashlights. My take is headlamps tend to be too big and heavy so instead I have a 1xAAA LED flashlight. It has three modes: 4 lumens low, 20 lumens medium, and 70 lumens high. The low is actually too bright to preserve night vision for close work, but works ok for shining on the ground and walking around when (mostly) dark adapted. It has a clip that can be used 'reversed' and clipped to the bill of a baseball cap and thus become a headlamp without a lot of weight and bulk (assuming you're wearing a cap anyway). It'll also shine continuously for over 24 hours on low using a featherweight lithium AAA battery, which to me is amazing.

As someone already mentioned, candlepowerforums.com has a mind-boggling amount of info on tiny and bright LED flashlights. There are literally dozens if not hundreds of lights out there to choose from.

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#126022 - 12/29/09 12:42 PM Re: Flashlights and Filters [Re: tylernt]
Eugene Offline
member

Registered: 12/26/09
Posts: 60
Loc: San Diego, CA
I don't have much to add other than to get a red led flashlight. You should save a considerable amount of power versus using white led's and filtering out all the other colors.
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