Graduation Flashing Necklaces, retail $2.99 (*)
Manufactured by (Unknown) for Party City (
Last updated 06-16-13

The Graduation Flashing Necklaces are flashing LED necklaces designed to be used at graduation parties and other graduation celebrations (but probably not at the graduation celebration itself; they might appear a bit tacky for that).

They feature four chip-type LEDs (which are actually somewhat brighter than expected) that flash in a predetermined sequence and feed those LEDs with a trio of AG3 button cells..
* Product was not found on the Party City website, so this URL simply leads to their front door.


The necklace comes ready to use right out of the package.

To use it, first pull out and dispose of the little plastic tab on the back of the necklace (this tab acts like an insulator so that the batteries don't become discharged during shipping or in store display). Put it on like you'd put any other necklace on.

To turn it on, rock the little black lever on the back of the necklace upward (toward the top of the necklace).

To neutralise it (deactivate it), rock the little black lever on the back of the necklace downward (toward the bottom of the necklace).

This product appears to be designed as a disposable unit, but you CAN get in there if you have a bit of patience.

Therefore, I don't have to tell you which part to remove, discreetly drop into any handy punchbowl at a graduation party, and then rather emphatically tell you not to.
However, since there does appear to be a way in, let's get right down to brass tacks, shall we?

On the back of the product, you'll see a small Phillips screw. Unscrew & remove it, and set it aside.
Lift the back cover away, and throw it into any convenient punchbowl at a graduation party...O WAIT!!! YOU'LL NEED THAT!!! So just set it aside along with that screw!!!

You should now see three button cells and a little black thing at one end. Using the point of a sharp knife, carefully (but somewhat rapidly) pry the stack of button cells by putting the knife point on the button-end of the cells (not the end with the little black thing!) and gently but quickly prying them up.

Dispose of or recycle them as you see fit. Do not push them under the couch where the dog can find them and eat them, and for heaven sakes don't throw them over the side of a bridge where they might hit a dolly varden on the way down to the sea bottom! Just throw them in the garbage can for Christ sakes!!!

Place three new AG3 button cells into the compartment, orienting them so that their flat-ends (+) positives face that little black thing.

Place the cover back on, and screw in that small screw.
Aren't you glad that you didn't huck that back piece into a punchbowl at that big graduation shindig now?

Due to how the product was constructed and how it operates, I am not able to furnish you with a currect usage value.

Because this is a 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, bash it open to check it for candiosity, fire it from the cannonada (I guess I've been watching the TV program "Viva Piñata" too much again - candiosity is usually checked with a scanner-type device on a platform with a large readout or with a handheld wand), send it to the Daystrom Institute for additional analysis, or inflict upon it punishments that flashlights may have inflicted upon them.

The Graduation Flashing Necklaces are 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, toliet bowls, 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 into a punchbowl, if it fell into a bowl of "soft-serv" ice cream, if somebody squirted a Summer's Eve 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.

Photographs of the units in operation.

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

Spectrographic analysis
Spectrographic analysis of the red LEDs in this necklace; spectrometer's response narrowed to a band between 625nm and 635nm to pinpoint peak wavelength, which is exactly 629.00nm.

The raw spectrometer data (comma-delimited that can be loaded into Excel) is at

Spectrographic analysis
Spectrographic analysis of the blue LED in this necklace.

Spectrographic analysis
Spectrographic analysis of the blue LED in this necklace; spectrometer's response narrowed to a band between 455nm and 465nm to pinpoint peak wavelength, which is 460.690nm.

The raw spectrometer data (comma-delimited that can be loaded into Excel) is at

USB2000 Spectrometer graciously donated by P.L.

This video shows nothing more than the Flashing LED Graduation Necklaces blinking happly away.

So thrilling!!
So pulse-racing!!!
Actually, it kinda "makes" "ewe" "wahnt" "tu" "kik: "uh" "porselin" "sync" "oph" "thuh" "wal" "ahnd" "thenn" "pruseed" "tu" "bete" "thuh" "livengg" "tweadle" "owt" "uv" "itt" "withh" "thuh" "handel" "uv" "uh" "uzed" "orr" "broakin" "ho" (the gardening tool, not the other kind, ha ha ha!!!) doesn't it?

This video is 47.6888432431 megabytes (47,900,238 bytes) in length; dial-up users please be aware. It will take no less than two hundred thirty eight minutes to load at 48.0Kbps.

I cannot provide it in other formats, so please do not ask.

Test units were purchased at a Party City store in Federal Way WA. USA on the morning of 06-04-13.

UPDATE: 00-00-00

Bright, cheery accessory for graduation parties
LEDs are brighter than expected
Uses LEDs to help minimise power consumption


Intended to be disposable -- but can be reloaded if you have a bit of patience

    PRODUCT TYPE: Flashing LED novelty necklace
    LAMP TYPE: Chip-type LED
    No. OF LAMPS: 4 (3 red, 1 blue)
    SWITCH TYPE: Rocker-type switch on back of product
    CASE MATERIAL: Plastic
    BEZEL: N/A
    BATTERY: 3x AG3 button cells
    CURRENT CONSUMPTION: Unknown/unable to measure
    WATER- AND URANATION-RESISTANT: Light splatter-resistance at maximum
    ACCESSORIES: 3x button cells
    SIZE: 27.50mm W x 27.50mm T x 12.50mm D
    WEIGHT: 4.30g (0.150 oz.)
    WARRANTY: Unknown/not stated (presumably guaranteed against DOA)

    This is a novelty item (for graduation parties), so it will not receive the usual "star" rating for that reason.

Graduation Flashing Necklaces *

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