Are y'all aware that flashlights can cost $200, $300, or more? I always thought Maglite was the top of the line, but nooOOOOoooo! Briefly check out these tactical flashlights to see what I'm talking about. AND DON'T FORGET TO HIT THE BACK BUTTON TO COME BACK HERE.

I got interested in high powered flashlights through a friend who had discovered them. All I could do was dream of the bright light, until, while surfing the Internet I came across the Candlepower forums. Candlepowerforums.com is where they talk flashlights and make-over flashlight projects. The projects range from changing the bulb out to rewiring and adding logic circuits. After plenty of reading I came away with a plan to get started and build this simple but very bright flashlight.

This flashlight has most of the guts of a $200 model. I like this flashlight better than the $200 models because it is much lighter weight and if it gets lost, I won't feel too bad about the cost. This one is much brighter than anything you can get under $100 and almost as bright as the really expensive ones. I made mine in an hour.

What makes a $200 flashlight worth the money? First of all their major customer is the Federal Government. The US Army, Marines, FBI, and all the police departments around the country use these lights. So supply and demand is what keeps the cost high.

What makes a tactical flashlight so nice? As the Surefire advertising says...

SureFire, the tactical technology company developed Special Operations Lights for law enforcement and military applications where intensely bright light is used to startle, disorient, and control anyone on the receiving end, and where hard use in tough environments is expected. Featuring optically coated and tempered Pyrex lenses and Mil-Spec Type III hard-anodized finishes, these flashlights also have an internal shock isolation system to cushion the lamp assembly against impact, plus double O-ring seals for redundant moisture protection.

How does mine compare? Well, it has an intensely bright light which will startle, disorient, and control anyone on the receiving end (and you can see what varmint is making all the noise in the dark). Mine is not for use in tough environment, does not have shock absorbers, O-rings, Pyrex lens or an anodized finish. Basically all it has is that intensely bright light thing going for it, oh, and mine is intensely inexpensive.

Mine has a very bright spot, good projection, no visual "artifact," batteries last a decent time, and it will clip right onto your rifle. Actually mine won't clip to your rifle, but is very light weight, will hang from a tree, and did I mention inexpensive. In fact this one is made from one of the cheapest lights I could find, so it is not going to attract the attention of someone looking to steal your very cool high powered beam.

In order to make this light, you need a cheap flashlight body, new bulb, new batteries, and a custom made battery holder.

Step 1: Parts list

1 RayOVac "Industrial" flashlight
1 KPR118, 7.2-volt, incandescent, flashlight bulb
3 CR123A lithium photo flash batteries
1 4-inch long piece of 3/4-inch, cold water, schedule 40 PVC
1 3/4-inch long #8 bolt
4 #8 by 1-inch diameter fender washers (from the parts bins at Lowe's)
4 #8 hex nuts
E6000 glue

Why these parts?

The flashlight body:
This particular flashlight body is important because it has a "prismatic" reflector. This is the key element to eliminating the artifacts from the projected beam. Have you ever noticed that when you project a smooth reflectored beam onto a wall you see a dark spot in the middle along with shadows and streaks in the beam? What you are seeing is the magnified and projected inner guts of the bulb itself. These "impurities" in the light beam are called artifacts.

The "prisms' in the reflector on this model of RayOVac flashlight blend the bulb reflections together and average out the light with the dark. The result is you see only a pure beam with a slight halo. Even if you don't do anything to this flashlight, it will give you a much nicer projected beam than a smooth reflector will. I also like this body because it is bright yellow (easy to find) and it is very light weight. And I like it because it has room in the head behind the reflector to do other mods later.

The bulb:
If you try to run 9 volts through a 3-volt flashlight bulb, it will blow before you can see it. It's hard to find a 9-volt bulb, but the folks at Radio Shack will tell you the KPR118 bulb will work. It does, but it does not last forever.

The batteries:
These are 3.0 volts each and last a pretty long time. When you use three in series, you get 9 volts in a smaller and MUCH lighter package than D-cells. These are the heart of the flashlight. Once you decide you like these batteries, you can buy them online for about a dollar each.

The PVC pipe:
This is needed to keep the batteries in the center of the flashlight body. The cold water pipe fits perfectly inside the D-cell flashlight and the batteries fit nicely inside the pipe.

The bolt, washers, and nuts:
Notice that the three CR123A batteries are about 3/4 inch shorter than the two D-cells. The spacer made from these parts makes up that difference.

E6000 is a hobbiest's glue. I got mine at Michael's. Any hobby shop that carries artificial flowers should have this glue. You could use caulk, Gorilla Glue, or any sturdy glue. I have even used white glue, but that is very temporary.
<p>I love this! Great instructable! Thanks for sharing.</p>
<p>I have to chuckle because we have been blinding people for years with our special USA patented circuit equipped flashlights ... and for alot longer than any pitiful 3 hours. We even had one run for almost 6 weeks 24/7 !... our stock EZ-GO 1985 golf cart was clocked at 30mph ! </p><p>DoubleBatteryLife.com... gets 2x normal energy out of any battery and brightly too! Watch the 2 videos (to the right) and get ready to doubt and nay say... but it really does work... if you can find a factory and get it into market place I will share 25% of what money I get from it . ALL RIGHTS RESERVED patented in the USA... works in motorized devices too, would be great for car starting battteries, dig cams, hearing aids, flashlights, well really everything even heart defibrillators (which have a bad habit of not working when needed). Because the Patented circuit gets even more time due to the natural auto regeneration of electro-chemical batteries it even gives the user a life cycle even when drained to the nth degree, they come back the next day for even more time (with diminishing returns for about 7 days.)</p>
<p>It appears that your </p><p>INVENTPEACE@AOL.COM email no longers works as I can not send to it. I am interested in the patent</p><p>Please send to GBW10@mail.com</p>
This is interesting, but I feel it's pretty far reaching to call it a tactical flashlight. Anyway, you can find a T6 led drop in for $7 on ebay and a host body on Solarforce's website for $11, that's a &quot;tactical&quot; light.
I modded a old Coleman night sight 2d flashlight with basically the same concept but instead of 3 a123 lithium batts I used 6 aa nimh rechargeable batts in series with some battery adaptors. I used the same bulb as in kipkays and your mods and all I can say is WOW!! Haha that cheap little krypton bulb can really pump out some lumens when it is overcharged a bit with good batts. Defiantly not as good as halogen and xenon bulbs but it really impressed me. Nice instructable!!
<p>Awesome!</p><p>I always wanted to mod my flashlight after going on a Boy Scout campout and my light was pathetically dim. Now I can *attempt* not to blind anyone with my really awesome flashlight! (that probably cost less than everyone else's as well) Thanks for the tutorial :)</p>
<p>Nope, check your dates kids, Kipkay did it *after* this one. No need to get petty about it. We're all a family here, learning from each other. Competition need no be a part of that. </p><p>I did this just to get familiar with it and it was easy peasy. Nice and bright - not too hot yet. </p><p>Thanks!</p>
I bought a <a href="http://www.buytacticalflashlights.com/fenix-flashlights/Fenix-PD32" rel="nofollow">fenix pd32</a> that was far less than 200$. Surefire is overpriced for what you get and other flashlight brands like fenix or 4sevens are reasonably priced
Yes prices have fallen considerably over the 6 years since I posted this. I'm buying my torches from Sam's Club, 2 for $20. They are so much better than my Instructable, but back at the time, this was a pretty good hack.
Nice 'ible! <br>am following you... :) <br>
Nice job!
AWESOME!! Loved reading this one!!<br>TY for sharing Sir!! :)<br>
Useful and well done instructable, thanks.
Is it possible to make something equally bright using the same steps or similar with LEDs?
I'm sure it is. I was looking at that technology when I first wrote that Instructable, but it was a little beyond my scope. Look around for more on that topic.
Damn, maybe someone else can share their thoughts/experience?
I love this! Super to share with all my guys! Thanks for sharing.<br>Sunshiine
Got a good flashlight at the thrift store for a buck. Had the other parts except batteries and bulbs. Local hardware store had Maglite replacement bubbles for 6-Cell C &amp; D. 2 Krypton for $5 (I put the spare in the little clamp under the reflector). Got curious though and bought the Xenon for $4. It's much brighter and of course more bluish. I love this flashlight! Excellent Instructable!
lol...kipkay hack, anyways, i tried this on an everready torchlight and it worked briliantly, but the heat from the bulb had nowhere to go, and beacuse the body is made out of plastic, there's no proper heatsink. and after a few months, it stopped working, for no apparent reason. But i suspect that the major cause is because it doesnt have a proper heatsink.
I melted one with Kipkay's design, too. There are pictures somewhere buried in the replies to his Instructable. Mine has the metal spacer for the battery which apparently does absorb some/dissipate some heat.
is the light emitted stronger than the bulb that comes with the torch im looking for a high power torch i can go shooting wit at night im from ireland so battery sizes are different
I read this a few yrs back it seems. Also one for a smaller 5-6 &quot; version that didn't require the PVC, &amp; adapter, but DID require that one hollowed out the barrel w/ a 5/8&quot; drill bit (not a spade as I discovered). I found that Ray-O-Vac didn't make tha smaller version w. a reg bulb, but an LED instead. I did find an EverReady, which I still have, and a version like it @ Sears. Can't find either anymore. But I have found $2 -5.00 flashlites I have converted to 9V &quot;torches&quot;. Except, I couldn't leave them on more than a few seconds at a time to get a quick glance around, as they would melt the reflector. AND shut themselves down. I just recently thot, and took the plastic lense off the front to let it breathe, and have had no problem since. I &quot;grooves me out&quot; to find a nicer, rubber-coated sometimes, flashlite for $5.oo &amp; make it into one that will lite up the house down the street, or temp blind someone, or find a contact or glasses screw on the floor. Then I found a small version of the Army flashlite which has the reflector at a right angle to the body @ an Army/Navy store for $5.00 and the 3V batts. fit w/o adaption. !
great instructable I was about to spend &pound;60 (it costs $60 aswell) on a flash light for airsoft but now im definatly making this maybe even try a kipkay style idea and hook it up to a laser tripwire on my house lol we have had 2 atemmpted burgalrys in 3 weeks lol.
You could use this instructable to make it into a bright scuba light, although I don't know what affect it will have on the brightness and it will make it heavier.<br>P.S. This instructable is not mine.<br>http://www.instructables.com/id/Hack-a-4-LED-flashlight-into-a-scuba-diving-light/
Why don't you just use a 9v battery???<br> And this is a good idea. I will try it!<br>
If a 9-volt would fit into the little flashlight, then yes.
How many lumens does the flashlight give off?
I can't measure lumens. All I know is what you see in the images. If someone made me guess I'd say about 100. That's based on comparison with the Maglight and several 150-lumen flashlights I've owned.
Ive done this before, way cool.
Well, sorry to give you all of that grief. I guess that yours was before kipkay.
hey, didn't kipkay already do this?
At the risk of looking defensive, Kipkay published his flashlight mod after mine. In fact he credited me for the inspiration in <a href="http://www.instructables.com/id/%24100-Super-Bright-Flashlight-for-under-%2410!/">his Instructable</a>.&nbsp;<br>
Yes, sort of. Kipkay &quot;already&quot; did his two days after I posted mine.
couple questions. do i need an aluminum refletor and glass lense to do this? whats the run time on this? will the bulb fit a maglite
These lights run hot. Every bulb is a little different. The cheap light I started with was all plastic and seems to have lasted. If you look at Kipkay's Instructable that he published a couple days after mine, he used a different flashlight body. I tried it and melted the bulb holder beyond use. Look at the comments after Kipkay's flashlight post and you'll see the pictures of my melted light.
Good instructable but it doesnt count if you copy kipkay.
Check the dates. Kipkay was inspired by my Instructable to make his.
&nbsp;Could you have used smaller diameter washers that fit inside the pvc pipe, and then cut the pipe longer? No need to glue and would still be centered (provided the pvc is centered).
That's a great idea!&nbsp; I think it would work fine and be much faster and easier to make.&nbsp; Remember to wrap the outside of the pipe with rubber bands or something to help center it inside the flashlight.&nbsp; <br />
Won't the light burn out becasue it is rated for 7.2 volts and you put in 9?
There is some tolerance for overvoltage in most bulbs.&nbsp; Otherwise they would all have a very short life.&nbsp; I have had bulbs simply flash on and burn out but not all of them do.&nbsp; I usually buy 2 at a time.&nbsp; <br />
Why not jam a resistor in there?<br />
&nbsp;Great Mod. I personally still prefer my Fenix l2d, only $55. However this would make a great light you can had to a young kid. I would be a little nervous to hand my Fenix to a 5 year old.
I'm going camping in Colorado in a few weeks and I think you just solved my flashlight issue. This project will be useful!!
Think, I'll go with a twelve volt bulb, and either use four 123's if they'll fit, or use three A23's and parallel them for more battery life. At least this way, I don't need a logic circuit to keep from killing someone. Namely myself and my family. May need to modify the head or get a different case altogether, not sure how much heat the 12v would produce, but at least it'll run at capacity. Not as hardcore, but at least it's safe.
Not necessarily. If the 12V bulb draws too much current (think big halogen) for the 123's to handle, they'll explode or at least cut off from the internal short circuit protection. Don't use A23's, even three in parallel will have tons of internal resistance and don't really have a place in anything decently bright. Also, overdriving a bulb won't cause a fire unless the whole head melts and the bulb manages to touch something flammable since the plastic will insulate the bulb's heat. The batteries sure won't be stressed by the 1 amp drain of the KPR118. The most dangerous thing that might happen is the window melting and the bulb envelope exploding, sending shards of glass out the front. But from my knowledge, this only happens with halogen bulbs if you touch them and leave oil on their quartz envelope.
Just FYI.... I just did this project today (4-28-2009). Here is what it cost me. Bought the Rayovac flashlight (model IN2D) at Lowe's for $5.94 (+tax). Bought two 2-packs of the Surefire batteries (model 123A) for $4.97 (+tax). You only need 3 of these batteries for this project. Bought the bulb (model KPR118) at RadioShack for $1.79 (+tax). I had the PVC pipe, washers, and nuts on hand so no cost there. Total for me was: $13.46 (total includes the tax). One thing I would like to point out, I used a bigger piece of PVC and slid the smaller one inside the bigger one. This worked perfect and made for a better fit. Also, I did not glue the spacer in because when I screwed the cap on everything was very secure. Very happy with the outcome of this project. Flashlight is very bright. Thanks for the submission of this project....
Will give it a try with a surplus Navy Flashlight.
Could you do this in a mini maglight? If so, how would you approach it?

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Bio: I was an engineer for the Air Force for 28 years and did land ownership research across Texas for several years. Now I am a ... More »
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