J-LIGHT
J-Light, retail $24.00 (http://store.unbeatablesale.com...)
Manufactured by (Unknown) for Zelco (www.zelco.com)
Last updated 10-27-13
As you can see, this very funny looking light reminds me of a lamprey, an eel-like animal with a round sucker mouth ringed with tiny razor-like teeth. Lampreys live mostly in coastal and fresh waters, although at least one species, Geotria australis, probably travels significant distances in the open ocean.
While out getting hammered on New Year's Eve 2000 (12-31-00), somebody just handed one of these things to me and slinked back into the darkness of what I believe was the now-defunct "21st Century Foxes" lounge in Seattle, never to be seen again. It became lost or misplaced sometime in late-2004; only recently did I see they were still for sale, so I purchased one for this website sakes.
The J-Light (shown on the instructional materials as the "LED keylight") is a small keychain LED flashlight in a translucent plastic body. It has a diffused (milky case, not transparent) 5mm white LED in the end, which casts a very even, pure white light, with no rings, spots, or other evil little things (artifacts) in it. In addition to the light emitted from the front of the unit, the entire body of the product softly glows when the unit is activated.
The unit feeds from four LR44 button cells (included, already installed), securely held within its plastic body.
I've been known to call it "The Lamprey Light", for obvious reasons; I started a thread on Candlepower Forums in early-2001 called ''Zelco light looks like a lampey :)''.
They are available with body colors of graphite (a dark grey color), blue, and orange.
As you can see by the photographs on this web page, this is the orange bodied version.
SIZE
For momentary operation, press and hold in the pin on the tailcap. To turn it back off, just release the pin.
Twisting the keyring will lock the light on, and another twist turns it off.
To change the batteries, unscrew & remove the tailcap, gently place it on the ground, and kick it into the garden so the hungry, hungry praying mantids will think it's something yummy to eat and subsequently strike at it...O WAIT!!! YOU'LL NEED THAT!!! So just set it aside instead. 
Tip the four used LR44 button cells out of the barrel and into your hand, and dispose of or recycle them as you see fit.
Insert four new LR44 button cells into the barrel, orienting them so their button-ends (-) negatives go in first.
You can also stack the four LR44 cells on a table, counter, desk, or other flat surface with an edge; button-ends (-) negatives up. Lower the body of the J-Light over the cells, and slide it to the edge. Place a thumb or finger over the barrel so all of those brand spanken new batteries just don't clatter all over the floor, and invert (flip over) the J-Light and your thumb or finger simultaneously (at the same time). Remove your thumb or finger from the light when the opening of the barrel faces up.
Finally, place the tailcap over the opening and firmly screw it back on.
Aren't you glad you didn't kick that tailcap into the garden with all those hungry, hungry praying mantids now?
Due to the way the J-Light was constructed, I'm not able to measure its current usage.
Here is what a praying mantis looks like.
I found this guy on the morning of 09-08-06 clinging to the basket of my scooter.
Here's a photograph showing the lamprey-like "mouth".
This is from the original I received on the evening of New Year's Eve 2000 (just a couple of hours before the year 2001).
I don't normally administer "The Smack Test" on plastic flashlights, but this one appears tough enough - and it is!!!
After ten firm whacks against the concrete floor of a patio (five on the side of the tailcap and five on the side of the bezel), no visible damage was detected. No optical or electrical malfunctions were detected either. The light did blink on briefly with each smack of the bezel, but it did not become "stuck" or stay on.
There are no environmental seals (O-rings) visible on it, so is not all that water-resistant. Therefore, water, milk, diet vanilla Pepsi, cold (or hot) coffee, urine, ice cold fizzy root beer, disposable douches, disposable enemas, or other liquids could get inside. So please try not to drop it in creeks, rivers, ponds, lakes, oceansides, docksides, snowbanks, puddles of albino lab rat pee, 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, leaky water heaters, busted garden hoses, puddles of antifreeze, brake fluid, tranny fluid, gasoline, or other places where water or water-like liquids might be found. And you'll probably want to cover it up or otherwise get rid of it (such as by putting it in a pocket or bag) if you need to carry it in rainy or snowy weather. 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 peed on it, rinse all the parts out with fresh water before setting them out to dry. You don't want your J-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 urination), lactic acid (from moo juice), or sugar (from root beer & ice cream) can't be very good for the insides.
The light produced by the J-Light is very soft, of wide angle, and dim; this would make it a fantastic candidate for a "walking-around-the-house-at-night-without-waking-up-your-spouse/significant other/children/brother/sister/visitor/etc.; stepping-on-pet-dog/pet-cat/squeaky-pet-rat-tails; stubbing-your-toes-on-coffee-tables/breaking-lamps, etc." light.
Phew!!!
There are sure a lot of dashes (-) in that sentence, aren't there?
Beam photograph on the test target at 12".
Measures 1,800mcd on a Meterman LM631 light meter.
This is a very wide-angle light, and if I've told you once, I've told you 1,000,000,000 (a billion) times:
Wider viewing angles always, always, ALWAYS equal lower mcd values!!!!!!!!!
Photograph of the entire light glowing, as I mentioned earlier on this web page.
Spectrographic analysis of the LED in this flashlight.
Same as above; newer spectrometer software setting used.
Spectrographic analysis of fluorescence of the orange tailcap of this product when irradiated with the Wicked Lasers Spyder 3 Arctic 445nm 1W Blue Diode Laser.
Spectrographic analysis of the LED in this flashlight; newest (01-13-13) spectrometer software settings used.
Spectrographic analysis of the LED in this flashlight (newest {01-13-13} spectrometer software settings used); spectrometer's response narrowed to a band between 455nm and 465nm to pinpoint native emission peak wavelength, which is 458.930nm.
Spectrographic analysis of the LED in this flashlight (newest {01-13-13} spectrometer software settings used); spectrometer's response narrowed to a band between 550nm and 600nm to pinpoint phosphor emission peak wavelength, which is 570.610nm.
The raw spectrometer data (comma-delimited that can be loaded into Excel) is at http://ledmuseum.candlepower.us/42/j-light.txt
USB2000 Spectrometer graciously donated by P.L.
TEST NOTES:
Test unit was purchased on 06-01-07, and was received at 4:04pm PDT on the afternoon of 06-11-07.
Somebody gave me one of these late on the evening of 12-31-00; it became misplaced or lost in late-2004.
UPDATE: 06-13-07
I used the J-Light this morning instead of the LRI Proton that I normally use every morning for navigating a dark house between the bathroom & patio door, and it did a very nice job of lighting my way without blinding me.
UPDATE: 08-01-07
The switch appears to have failed.
When I got up this morning, I noted an orangish-white glow on the night table - it was the J-Light. The switch appears to be stuck in the "on" position; although I can get the light to go dim, I cannot make it go completely off unless I unscrew the tailcap a turn or two.
I have not dropped, sat on, stepped on, drowned, or otherwise abused this light, so I cannot explain this failure.
UPDATE: 08-01-07
No, you aren't seeing things.
Yes, a same-day update.
The problem appears to be that the batteries have swollen slightly, causing the total length of the stack of four cells to increase. Though this increase is small, it is large enough to affect correct functioning of the switch - this is not a technical problem with the J-Light itself, but with the batteries.
UPDATE: 10-22-13
A couple of nights ago when I was using this light in my sister's presence, we had the following exchange:
(My sister): "You know what that light looks like, don't you?
(Me): Yeah, it looks like a lamprey.
(My sister): A lamprey? What's a lamprey?
(Me): A type of freshwater fish.
(My sister): No, it looks like a part of the...male anatomy!"
PROS:
Appears to be reasonably well-constructed
Unusual appearance that is actually quite functional
Wide-angle, soft white light
CONS:
Not submersible
Some users may dislike the glow from the light's body
Uses batteries that could be expen$ive and/or difficult to procure in "brick-&-mortar" stores
MANUFACTURER: Unown for Zelco
PRODUCT TYPE: Keychain flashlight
LAMP TYPE: 5mm diffused phosphor white LED
No. OF LAMPS: 1
BEAM TYPE: Medium flood
SWITCH TYPE: Twist keychain on/off
CASE MATERIAL: Plastic
BEZEL: Plastic; LED inset into hosel for it
BATTERY: 4x LR44 button cells
CURRENT CONSUMPTION: Unknown/unable to measure
WATER- AND URANATION-RESISTANT: Light splatter-resistance at maximum
SUBMERSIBLE: NO WAY HOZAY!!! 
ACCESSORIES: 4x LR44 button cells
SIZE: 4 3/3" x 3/4" x 7/8"
WEIGHT: 22.10g (0.780 oz.) incl. batteries
COUNTRY OF MANUFACTURE: China
WARRANTY: 1 year
PRODUCT RATING:
J-Light * http://store.unbeatablesale.com...
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