For certain applications a red lensed flashlight can come in very useful. If you are looking at star charts or trying to get around the woods and want to not ruin your night vision, these are perfect.

This instructable makes one from parts you can find very easily and cheaply.

Step 1: Supplies

For this instructable you will need:
1. LED flashlight, the one i used is from a walgreens, you can get these lights for much less on ebay, about 99 cents.
2. Red Photography Gel, This was free from a photo store down the street they give away sample packs to students.

Step 2: Take Apart Your Flashlight

First you want to take apart your flash light, do this carefully, not all these lights are made to be disassembled.

Step 3: Cut The Gel

Cut the gel into a square that will fit into your lens. Then use the clear plastic from the flashlight to cut a circle the size of your lens.

Step 4: Rebuild Flashlight

Step 5: Results

Once the light is done go test it out, you should be able to see things and still have your night vision when the light turns off. If it seems too bright, you may need a deeper red.

This flashlight will be very useful on your next camping trip!
<p>Great Idea, think I will do this on a smaller edc light that I take camping with me...</p>
i did this. except i couldnt get the photography gels so i used the plastic battery separator thingy that came with the flashlight. glad it was red haha
this helps me run from the cops. works every time.
How will this help you run from the cops?
sure... sure.
LIKE<br />
Unfortunately though many people <a href="http://www.cheap-uggs-boots.com/sundance-ugg-boots/" rel="nofollow"><strong>UGG Sundance</strong></a> are told to avoid the wrong thing - they are told to avoid sugar when the real culprit is fat.Fat, unlike sugar, is very hard for the body to digest. This means it can take substantial amounts of time to digest - up to <a href="http://www.cheap-uggs-boots.com/sundance-ugg-boots/" rel="nofollow"><strong>Sundance ugg Boots</strong></a> 24 hours or more. As a result it stays in the blood and can interfere with other foods you eat especially sugar. When you eat sugar after eating fat, the fat in your blood will prevent the sugar from moving through the blood to starving cells. This makes your blood sugar levels rise and <a href="http://www.cheap-uggs-boots.com/sundance-ugg-boots/" rel="nofollow"><strong>Sundance uggs</strong></a> this is a dangerous. Luckily the body has systems in place to combat situations like this. An organism found in the body called Candida helps out in this situation by eating the sugar which makes it multiply and bringing <a href="http://www.cheap-uggs-boots.com/sundance-ugg-boots/" rel="nofollow"><strong>ugg 5325</strong></a> down the sugar levels. If you always have a high fat diet then you will always have a problem with Candida in that the organism will be about <a href="http://www.cheap-uggs-boots.com/sundance-ugg-boots/" rel="nofollow"><strong>ugg 5325</strong></a> in high levels. However high fat on the odd occasion should not be a problem.
i got 2 of these at Harbor Feight for 2.99 *(with coupon)
With white LEDs the light is turned pink rather than red. That means less protection for night vision. A torch fitted with one of the old incandescent bulbs is better. In Britain, look for Quality Street sweets (I think Americans call them candies?) with red cellophane wrappers that are perfect. Good excuse to eat sweets too.
Great post. More people should use these.
Very useful, I have though this project might be more expensive. Thanks for the info!
This is great! I've been looking everywhere for something like this.
And why, pray tell, would you need such a thing in a bathroom?
To aim. :D
I'd imagine that, unless you're a ninja, you'd pee with the lights on. Of course, if you're a ninja, you could see in the dark, and you certainly wouldn't need this instructable.
I need one of these I never thought of this .. I thought of buying a flashlight and replacing the LED with red LEDS .. THis is easier and cheaper . Thanks :D

About This Instructable


40 favorites


Bio: Freelance Lanceman
More by frenzy: Cómo hacer una placa iluminada con teclas de un teclado Una funda para tu dispositivo, hecha de un traje de buceo Dead Drop inalámbrico
Add instructable to: