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Somebody set up us the bomb.

One Watt Flashlite, retail $39.95 (
Manufactured by LEDTronics (
Last updated 08-01-10

Wel, thuh kumpenie thaat selz thuh "One Watt Flashlite" kant spel thuh werd "flashlight", but they still make a decent product.

The One Watt Flashlite is a super bright, two-stage ("high" and "low" intensity modes) small handheld LED flashlight in a metal body. It has a bright 1 watt white LED behind a positive (magnifying) lens -- plus the bezel (head) can be moved in and out to allow for focusing the flashlight's beam as you see fit.

It feeds from 3 AAA cells held in a side-by-side carriage in the flashlight's barrel, and is switched to "high", "low", & "off" with a rubberised pushbutton on the end of the tailcap.

 Size of product w/hand to show scale SIZE

Use this flashlight much you'd use many other two-stage lights: press the rubberised button on the tailcap firmly until it clicks and then release it to turn it on "high" mode.

Do the same thing to turn this flashlight to "low" mode.

Do the same thing a third time to turn this flashlight back off.

Just like it reads on the backs of many shampoo bottles "lather, rinse, repeat".
In other words, pressing the tailcap button firmly until it clicks and then releasing it turns the flashlight back on in "high" mode.

Now comes the interesting part.
The beam width is adjustable simply by grasping the barrel with one hand, and the bezel (head) with the other.
Pull them apart to cause the beam width to narrow; and push them together to widen the beam.

To change the batteries in your One Watt Flashlite, unscrew and remove the tailcap, gently place it on the ground, and kick it into an open-pit cadmium or antimony mine so that a caterpillar or front-end loader will run over & flatten it...O WAIT!!! YOU'LL NEED THAT!!! So just set it aside instead.

Tip the black plastic battery carriage out of the barrel and into your hand. If necessary, remove and dispose of or recycle the used cells if they are present in this carriage.

Insert three new AAA cells into the carriage, one in each compartment. Orient each cell so the flat-end (-) negative faces a spring for it in its compartment.

Once the carriage is full, insert it into the flashlight's barrel, aiming it so the metal post on one end goes in first. Screw the tailcap back on, and be done with it.
Aren't you glad you didn't kick that tailcap into an open-pit mine now?

Current usage measures 214.2mA (low) on my DMM's 400mA scale and 829.0mA (high) on my DMM's 4A scale.

This flashlight appears at least fairly durable, and it is!!! When I performed that terrible smack test on it (ten whacks against a concrete driveway: 5 smacks against the side of the bezel and 5 smacks against the side of the tailcap), only some rather minor damage was found. There is some minor gouging to the bare Metaldarktyrannomon - er - the bare Metalarukenimon - um that's not it either...the bare a sec here...THE BARE METAL (guess I've been watching too much Digimon again! Now I'm just making {vulgar term for poop} up!!! ) on the sides of the tailcap & bezel where it was struck.
No optical or electrical malfunctions were detected.

The primary purpose of this test is not necessarily to see if the exterior of the flashlight would be damaged; it's more about the internal components which would be subject to a high shock load ("G force") every time it strikes the concrete.

It is also water-resistant but it is *NOT* submersible -- it failed "The Suction Test" on the back of the barrel but passed this test on the tailcap even when clicking the switch button several times while continuing to suction it. It did not fail this test miserably, but it did fail nonetheless.
A shallow water landing should not kill it if you fish it out of the water right away, and light to moderate rainfall should cause no harm to befall it either, but you do not want to dredge your One Watt Flashlite in deeper water -- and for Pete sakes, please do not use it as a dive light!

The lens is made of plastic -- probably acrylic, not glass.
I was fairly easily able to gouge it with the blade of a folding knife (I gouged it right at the perimeter {edge}, so the quality of light is not adversely affected to a noticeable degree).
Would I really attempt to gouge out the lens of a perfectly good flashlight?
You bet your sweet patootie (sugar-coated toliet muscle) I would, if it's in the name of science.

The light's beam is focusable from a fairly narrow spot to what I might call a medium flood; very little corona or spill beam is present despite the beam's level of focus.

The only thing that pisses me off (if only just a little) about this flashlight is that the beam focus assembly moves perhaps a bit ***TOO*** easily. Your desired beam width could rather easily become lost by the simple act of placing this flashlight head-down as you might for storage.
If you place it down somewhat gingerly, this adjustment stays intact; but you don't have to be very rough with it at all to nock this adjustment out of whack.

The two-stage (high/low) operation is made possible by a 47ohm resistor in the tailcap; a resistor was suspected when I was taking current usage measurements and was not able to get the light to switch to "high" mode on my DMM's 400mA scale and could not get it to switch to "low" mode on the 4A scale; this led me to theorise that the DMM's shunt resistance on the 400mA scale was responsible...and when I measured the resistance of the tailcap while clicking the button, the resistor showed up every third click.

Beam photograph on the test target at 12" (wide).
Photograph left intentionally uncropped to show beam edges.
Measures 384,000mcd (high) and 29,800mcd (low).

Beam photograph on the test target at 12" (narrow, high).
Beam image bloomed because of the high intensity.
Measures 8,080,000mcd.

Beam photograph on the test target at 12" (narrow, low).
Measures 417,000mcd.

All measurements were performed using an Amprobe LM631A light meter.

Beam photograph on a wall at ~10 feet (wide).

Beam photograph on a wall at ~10 feet (narrow, high).
Beam image bloomed because of the high intensity.

Beam photograph on a wall at ~10 feet (narrow, low).

Those colored graphics toward the left are my "Viva Piñata" posters, and that clock on the right that looks like a gigantic wristwatch is my Infinity Optics Clock.
You may also be able to see two of my SpongeBob SquarePants plush (Squidward Tentacles & Patrick Star) and a Digimon plush (Greymon)

Beam photograph on a ceiling (narrow).
Zoom on the camera was used to show beam shape.

Spectrographic analysis
Spectrographic analysis of the LED in this flashlight (low).

Spectrographic analysis
Spectrographic analysis of the LED in this flashlight (high).

USB2000 spectrometer graciously donated by P.L.

ProMetric analysis
Beam cross-sectional analysis (wide).

ProMetric analysis
Beam cross-sectional analysis (narrow).
Image made using the ProMetric System by Radiant Imaging.

Video clip on YourTube showing the zoom feature of this flashlight in action, in both "high" and "low" intensity modes.

This clip is approximately 4.578563451597 megabytes (4,745,624 bytes) in length; dial-up users please be aware.
It will take no less than twenty two minutes to load at 48.0Kbps.
I cannot provide it in other formats, so please do not ask.

Test unit was sent by H.C. of and was received on the evening of 07-29-10 (or "29 Jul 2010" if you prefer).

UPDATE: 00-00-00

Very bright
Reasonably durable
Easily adjustable beam width adjustment

Beam adjustment is possibly ***TOO*** easy (there goes ½ the star)
Not totally submersible (and there goes the other ½)

    PRODUCT TYPE: Adjustable beam width LED flashlight
    LAMP TYPE: High-powered 1W white LED
    No. OF LAMPS: 1
    BEAM TYPE: Varies from fairly narrow spot to medium flood w/sharp perimeter
    SWITCH TYPE: Pushbutton on/mode change/off located on tailcap
    BEZEL: Metal; positive (magnifying) lens protects LED
    BATTERY: 3x AAA cells
    CURRENT CONSUMPTION: 214.2mA (low) and 829.0mA (high)
    ACCESSORIES: 3x AAA cells
    SIZE: 112mm L x 33mm D
    WEIGHT: 3.50 oz empty; 4.80 oz w/batteries
    COUNTRY OF MANUFACTURE: Unknown; likely United States
    WARRANTY: 1 year


    Star Rating

One Watt Flashlite *

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