Flashing Holiday Necklace, retail $6.98 (www.lighterside.com...)
Manufactured by (Unknown)
Last updated 12-25-07

This is a novelty neckace designed to look like a string of downsized C9 Christmas light bulbs.

It has eight LEDs (4 red and 4 green), and can be set to operate in any of three modes:

1: Alternate flashing
2: Unison flashing
3: All lamps steady-on

It is large enough to go around the heads of virtually anybody who gets one; no need to worry about it not fitting and/or even snapping and subsequently becoming broken.


Remove the little transparent plastic tab from the rectangular battery box first.

Press & release the button on the battery box once to initiate alternate flashing - where the red and green LEDs alternately flash at ~2.5Hz (~5 flashes every 2 seconds).

Press & release the button again to flash all of the LEDs in unison (together) at ~2.5Hz (~5 flashes every 2 seconds).

Press & release the button again to run all eight LEDs in steady-on mode.

Finally, press & release the button again to turn the necklace off.

Photograph of the necklace...where else...on my neck, of course.

This product uses a very odd battery configuration: one CR1220 lithium coin cell and one LR1330 alkaline coin cell - connected in series. Conventional battery instructions advise strongly against using different sizes / chemistry of battery at the same time. The only other product I've encountered in all these years that uses different sizes of battery connected together is the Extreme2 Light.

To change the queer little batteries, unscrew & remove the small phillips screw from the battery cover located on that black thing on the necklace's back, and set the tiny screw aside where you won't lose it. Remove the battery door, gently place it on the floor, and kick it under that Christmas tree you're always forgetting to water...O WAIT!!! YOU'LL NEED THAT!!! So just set it aside instead.

***CAREFULLY*** lift that metal contact piece away from the batteries. I say "***CAREFULLY***" here because it is connected by a short, thin wire that would be very easy to break; and you'll almost certainly be SOL if that happened.

Remove the two used cells from the battery compartment, and dispose of or recycle them as you see fit.

Insert a new CR1220 cell and a new LR1330 cell into the compartment, orienting them button-side (-) negative down.

Place the battery door back on, and screw in that screw.
Screw it in firmly, but not too tightly, or else you'll strip the threads in the screw hole.
Aren't you glad you didn't kick that battery door underneath that dead, dead Christmas tree now?

Because this is a holiday-themed (Christmas, in this case) novelty item and not a flashlight meant to be thrashed, trashed, and abused, I won't throw it against the wall, stomp on it, try to drown it in the toylet bowl or the cistern, run over it, swing it against the concrete floor of a patio, use a claw hammer in order to bash it open to check it for candiosity, fire it from the cannonada (I guess I've been watching the TV program "Viva Piņata" too much again - candiosity is usually checked with a scanner-type device on a platform with a large readout, a handheld wand that Langston Lickatoad uses, or a pack-of-cards-sized device that Fergy Fudgehog uses), send it to the Daystrom Institute for additional analysis, or inflict upon it punishments that flashlights may have inflicted upon them.

The LED Necklace is not water-resistant or submersible, therefore, 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 blue whale pee, 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, 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 very large pocket or in a bag) if you need to carry it in rainy or snowy weather.

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

If it fell into seawater, got thrown into a glass of milk, if it fell in a root beer float, if it fell into a bowl of "soft-serv" ice cream, 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 it out with fresh water before setting it out to dry. You don't want your necklace 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), glycerol (from antifreeze), or sugar (from root beer & ice cream) can't be very good for the insides.

Steady on mode really isn't steady on; the LEDs rapidly strobe (probably using PWM {Pulse Width Modulation}); this helps to lengthen the life of those tiny little coin cells.

Photograph of the neckace, illuminated of course.

WMP movie (.avi extension) showing the product's modes.
This clip is approximately 3.7 megabytes (3,829,774 bytes) in length; dial-up users please be aware.
It will take no less than fifteen minutes to load at 48.0Kbps.
I cannot provide it in other formats, so please do not ask.

That sound you might hear is a commercial on TV; the product is not sound-sensitive.
The sound may be ignored or muted if desired.

Spectrographic plot
Spectrographic analysis of one of the red LEDs in this necklace.

Spectrographic plot
Spectrographic analysis of one of the green LEDs in this necklace.

Test unit was purchased on The Lighter Side website on 10-16-07, and was received on the afternoon of 10-23-07.

Product was made in China.
A product's country of origin really does matter to some people, which is why I published it on this web page.

UPDATE: 12-25-07
I received several positive comments about it last night as I went to open the gate for my mother (this is a gated community; you have to go outside & open the gate for non-residents).



    PRODUCT TYPE: Novelty flashing necklace
    LAMP TYPE: LED, type & size not known
    No. OF LAMPS: 8 (4 red, 4 green)
    SWITCH TYPE: Pushbutton on/mode change/off on battery box
    CASE MATERIAL: Plastic
    BEZEL: N/A
    BATTERY: 1x CR1220 lithium coin cell, 1x LR1130 alkaline coin cell
    CURRENT CONSUMPTION: Unknown/unable to measure
    WATER RESISTANT: Light sprinkle-resistance at maximum
    ACCESSORIES: 2xCR1220 lithium coin cells, 1x LR1130 alkaline coin cell (2 installed, 1 spare)
    WARRANTY: Unknown/not stated


    Star Rating

Flashing Holiday Necklace * www.lighterside.com...

Do you manufacture or sell an LED flashlight, task light, utility light, or module of some kind? Want to see it tested by a real person, under real working conditions? Do you then want to see how your light did? If you have a sample available for this type of real-world, real-time testing, please contact me at ledmuseum@gmail.com.

Please visit this web page for contact information.

Unsolicited flashlights, LEDs, and other products appearing in the mail are welcome, and it will automatically be assumed that you sent it in order to have it tested and evaluated for this site.
Be sure to include contact info or your company website's URL so visitors here will know where to purchase your product.

WHITE 5500-6500K InGaN+phosphor 
ULTRAVIOLET 370-390nm GaN 
BLUE 430nm GaN+SiC
BLUE 450 and 473nm InGaN
BLUE Silicon Carbide
TURQUOISE 495-505nm InGaN
GREEN 525nm InGaN 
YELLOW-GREEN 555-575mn GaAsP & related
YELLOW 585-595nm
AMBER 595-605nm
ORANGE 605-620nm
ORANGISH-RED 620-635nm
RED 640-700nm
INFRARED 700-1300nm
True RGB Full Color LED
Spider (Pirrahna) LEDs
True violet (400-418nm) LEDs
Agilent Barracuda & Prometheus LEDs
Oddball & Miscellaneous LEDs
Programmable RGB LED modules / fixtures
Where to buy these LEDs 
Links to other LED-related websites
The World's First Virtual LED Museum
Legal horse puckey, etc.
LEDSaurus (on-site LED Mini Mart)

This page is a frame from a website.
If you arrived on this page through an outside link,you can get the "full meal deal" by clicking here.