Tritium (self-luminous) Glow Rings, retail $17.85 (Ģ11.47*) (
Manufactured by Glow Rings UK
Last updated 01-28-12

These are self-luminous Glow Rings -- a keychain accessory that allows you to find & see your keys in the dark. These tubes glow by themselves (see below), and need no batteries, line current, or exposure to light beforehand.

* Website shown on one of the Glow Rings is defunct (it leads to a search portal), so a different URL was found and subsequently used.

* IMPORTANT: Pricing is accurate as of 01-23-12. Please visit the Currency Calculator for the latest currency conversion rates from British pounds to US dollars.

 Size of product w/hand to show scale SIZE

The Glow Ring is "ready to roll" as soon as you remove it from the package.
Insofar anyway as you do not have to hunt down some good batteries and then install them.

You simply attach them to your existing keychain with the handy-dandy split ring that is furnished and already attached, and then forget about them until you need to find your keys in the dark -- then you'll be drawn to them like a moth to a flame.

This product does not require batteries, so I do not have to tell you which part to remove, huck down the stairs into the basement crawling with thousands of hungry piss ants, and then rather emphatically tell you not to.

This is a self-luminous keychain accessory designed to be attached to your keyring and not {vulgar term for having had intercourse} with, not a flashlight designed to be thrashed, trashed, and abused. So I won't throw it against the wall, stomp on it, try to drown it in the toliet bowl or the cistern, run over it, swing it against the concrete floor of a front porch, use a small sledgehammer in order to bash it open to check it for candiosity, fire it from the cannoņata, drop it down the top of Mt. Erupto (I guess I've been watching the TV program "Viva Piņata" too much again - candiosity is usually checked with a laser-type device on a platform with a large readout (located at Piņata Central), with a handheld wand that Langston Lickatoad uses, or with a pack-of-cards-sized device that Fergy Fudgehog uses; the cannoņata (also located at Piņata Central) is only used to shoot piņatas to piņata parties away from picturesque Piņata Island, and Mt. Erupto is an active volcano on Piņata Island {In the episode "Les Saves the Day...Again", Paulie Preztail says "Hey, ever wonder why this park's called 'Mount Erupto' anyway?", then Franklin Fizzlybear says "I think its an old native term. Means 'very safe.'"}), send it to the Daystrom Institute for additional analysis, or inflict upon it punishments that a flashlight might have to have performed on it. So this section of the web page will be ***SIGNIFICANTLY*** more bare than this section of the web page on a page about a flashlight.

Inside the Glow Ring is a tube or vial filled with tritium gas and coated on the inside with a phosphor, not unlike the kind used for fluorescent light bulbs. When the radioactive tritium decays into a more stable element, it releases a beta particle (an electron). This electron smacks into the phosphor, and causes it to emit a tiny flash of light. Put enough of this stuff in one tube, and the glow will look continuous.

Tritium is an isotope of hydrogen, in that instead of one proton and one electron (a normal hydrogen atom), tritium is hydrogen with two extra neutrons. When this nucleus decays, it emits an electron, and the atom changes into helium 3. This isotope of helium is naturally occuring and stable, but there is very little of this isotope actually found in nature. The kind of helium in balloons is helium 4 - the other stable isotope. That's what most helium is.

Tritium is what's known as a "soft beta emitter", and the electron (beta particle) it emits is the lowest energy of any radioactive material. Even if your spiffy new Glow Ring were to become broken, the gas cannot penetrate the skin, and what small amount you might inhale is not absorbed in bone marrow, and is instead uranated out relatively quickly. So these devices are safe.

Tritium has a half-life of approx. 12.3 years -- that is, half of the tritium gas in any given container will have decayed into non-radioactive helium 3 in 12.3 years.

Photograph of the products in near-total darkness.

You must note that tritium has a half-life (like any radioactive isotope)
of approx. 12.3 years, so some of these Glow Rings have already lost over
half of their original intensity because I've had some of them for ten years.

Photograph of the products when irradiated with the Advancedmart High-Powered 365nm Rechargeable UVA LED Flashlight.

Greatly overexposed photograph of them glowing in the dark. They were not irradiated in any fashion before or during this exposure.

Spectrographic analysis
Spectrographic analysis of the light emission from the pink Glow Ring.

Spectrographic analysis
Spectrographic analysis of the light emission from the amber Glow Ring.

Spectrographic analysis
Spectrographic analysis of the light emission from the yellow Glow Ring.

Spectrographic analysis
Spectrographic analysis of the light emission from the green Glow Ring (a newer "X2" model).

Spectrographic analysis
Spectrographic analysis of the light emission from the ice blue Glow Ring.

Spectrographic analysis
Spectrographic analysis of the light emission from the blue Glow Ring.

USB2000 Spectrometer graciously donated by P.L.

All spectra were taken while the products were irradiated with the Advancedmart High-Powered 365nm Rechargeable UVA LED Flashlight so that the level of emitted light from them would be sufficiently high to resolve spectrographically.

Test units were sent by various website fans from ~2001 through ~2005.

UPDATE: 00-00-00



    MANUFACTURER: Glow Rings
    PRODUCT TYPE: Self-luminous keyrings
    LAMP TYPE: Tritium glow tube
    No. OF LAMPS: 1
    CASE MATERIAL: Plastic
    BEZEL: Plastic; tritium tube protected by plastic body
    SUBMERSIBLE: Yes, to shallow depths at minimum
    ACCESSORIES: Medium split ring
    SIZE: 48mm L x 10mm W x 23mm Ring diameter
    WEIGHT: Unknown/not equipped to weigh
    WARRANTY: Unknown/TBA


    Product is not intended to be used as a significant light
    emitter, so the conventional "star" rating will not be used.

Tritium (self-luminous) Glow Rings *

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