41xNUV LED "Flashlight", retail $4.99
Manufactured by (Unknown)
Last updated 02-01-09

This is a NUV (near-ultraviolet) "flashlight" that has two intensity settings, both achieved using a single pushbutton switch on the barrel. It comes in an almost-all aluminum body (the only two nonmetal parts that are obvious are the end window and the pushbutton for the switch.

It has 41 NUV LEDs in its "business-end", and feeds those LEDs with four AAA cells held in a side-by-side carriage in the barrel to keep the length of the product down.


Feed this "flashlight" four AAA cells first (see directly below), and THEN you can go find that cat pee.

Firmly press & release the button once to turn the 20 LEDs near the center on.
Do the same thing to operate all 41 LEDs.
Do the same thing again to turn the "flashlight" completely off.

As you can see, "off" really isn't "off" in this case.
The 20 center LEDs continue to emit a fairly feeble but easily noticeable glow; probably consuming 1 to 3 milliamps while doing so. Due to the way the unit was constructed however, I cannot measure the current usage; this is only a guess based on intensity.
Photograph shows the LEDs significantly brighter than they actually are.

This ***DOES NOT*** mean yours will behave this way; it looks like I may well have received a defective unit.
In fact, the probability is ***EXTREMELY HIGH*** that I received a defective unit!!!

To change the batteries in this "flashlight", unscrew and remove the tailcap, dash it to the ground, and stomp on it with old or used bowling shoes...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 four 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 plates on one end go in first. Screw the tailcap back on, and be done with it.
Aren't you glad you didn't stomp on that tailcap now?

Due to the way the "flashlight" was constructed, I am not able to obtain a current usage reading for you.

I beat the living tweedle out of it (gave it ten firm whacks against the concrete floor of a patio; five whacks against the side of the tailpiece and five whacks against the side of the bezel), and found the expected damage. There is some significant (not minor, but not major either) gouging to the bare Metalsandymon - er - the bare Metalsquidwardmon - um that's not it either...the bare Metalspongebobmon...er...uh...wait a sec here...THE BARE METAL (guess I've been watching too much Digimon again! Now I'm just making {vulgar term for poopoo} up! ) on the side of the tailcap and bezel where it was struck. No optical or electrical malfunctions were detected. It still works as well now as it did when I removed it from the little white box it came in.

This "flashlight" is splash- and weather-resistant at absolute maximum, but it is *NOT* submersible. Although there is an O-ring on the barrel where the tailcap comes off, the "flashlight" failed "The Suction Test" rather notably; which shows it will leak at the bezel (head). Therefore, liquids like water, milk, diet vanilla Pepsi, cold (or hot) coffee, urine, ice cold fizzy root beer, disposable douches, disposable enemas, tranny fluid, gasoline, diesel, jet fuel, brake fluid, motor oil, or other liquids could get inside. So please try not to drop it in creeks, rivers, ponds, lakes, oceansides, docksides, snowbanks, puddles of concentrated blue whale urine, tall cold glasses (or short lukewarm glasses) of milk, slush piles, mud puddles, tubs, root beer floats, toilet bowls, cisterns, sinks, cups of coffee (hot *OR* cold), fishtanks, dog water dishes, old yucky wet mops, wall-mounted porcelain urinators, puddles from leaky water heaters, near busted garden hoses, near Mythbusters gas tanks (gas tanks that have holes shot in them but still have gasoline in them), or other places where water or water-like liquids might be found.

A little rain or snow probably wouldn't hurt it though, so you need not be too concerned about using it in lightly to at most moderately bad weather.

If it fell in water and you suspect it got flooded, disassemble it as you would for a battery change, dump out the water if necessary, and set the parts in a warm dry place for a day or so just to be sure it's completely dry inside before you reassemble and use it again.

If it fell into seawater, got thrown into a glass of milk, if it fell in a root beer float, if somebody squirted a Massengill brand post-menstrual disposable douche or a Fleet brand disposable enema at it (and hit it with the douche or the enema), or if somebody or something took a leak on it, rinse all the parts out with fresh water before setting them out to dry. You don't want your light to smell like seaweed, sour milk, flowers, fresh butts, or rotten piss when you go to use it next. Besides, salt (from seawater, disposable douches, disposable enemas, or uranation), lactic acid (from moo juice), glycerol (from antifreeze), or sugar (from root beer & ice cream) can't be very good for the insides.

The LED bodies themselves fluoresce (glow) a light blue color when the LEDs are in operation.
I also verified the fluorescence by irradiating them with a Blu-ray Laser.

Beam photograph on the test target at 12".
Wavelength is too short for me to measure with the instruments at my disposal...well, I guess that isn't entirely true, as I do have a spectrometer - the instrument used specifically for measuring wavelength.

Photograph of the top of LED Hummingbird Wind Chimes fluorescing.

Spectrographic plot
Spectrographic analysis of the LEDs in this "flashlight".
USB2000 spectrometer graciously donated by P.L.

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

Test unit was purchased on Ebay on 02-26-08, and was received on the afternoon of 03-06-08.

The unit I received is very probably defective; it will not receive a final rating for this very reason.

UPDATE: 00-00-00



    PRODUCT TYPE: Medium size NUV LED "flashlight"
    No. OF LAMPS: 41
    BEAM TYPE: Medium spot w/dim corona
    SWITCH TYPE: Pushbutton on/mode change/off on barrel
    CASE MATERIAL: Aluminum
    BEZEL: Metal; LEDs protected by plastic window
    BATTERY: 4xAAA cells
    CURRENT CONSUMPTION: Unknown/unable to measure
    WATER RESISTANT: Light splatter-resistance at maximum
    ACCESSORIES: Wrist lanyard
    WARRANTY: Not stated



41xNUV LED "Flashlight" *

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