Tritium (self-luminous) ''EXIT'' Sign, retail $TBA (
Manufactured by Beghelli (
Last updated 08-07-13

This is a self-luminous EXIT sign made by Forever Lite. The letters E X I and T plus the "<" and ">" symbols at each end have self-luminous tritum tubes behind them so the sign can be seen and read in the dark - such as at night or when electrical power fails. These tubes glow by themselves (see below), and need no batteries, line current, or exposure to light beforehand.

 Size of product w/hand to show scale SIZE

The Tritium (self-luminous) ''EXIT'' Sign appears to be "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.

I see no handy means for mounting, so I'm honestly uncertain as to how to proceed from this point.

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 "EXIT" sign designed to be hung somewhere 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 exit sign are tubes or vials 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 a vial in this sign becomes 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.

Testing and radiation documentation for this product.

Photograph of the product in near-total darkness.

This is the same glow in 2005; a different camera was used here.

This is the same glow in 2013; another different camera was used here.

Spectrographic analysis
Spectrographic analysis of the light emission from this sign --
well, from ANY green-emitting tritium product actually.

Spectrographic analysis
Spectrographic analysis of fluorescence of the tritium segments of this sign when irradiated with the Wicked Lasers Spyder 3 Arctic 445nm 1W Blue Diode Laser (1).

Spectrographic analysis
Spectrographic analysis of fluorescence of the tritium segments of this sign when irradiated with the Wicked Lasers Spyder 3 Arctic 445nm 1W Blue Diode Laser (2).

USB2000 spectrometer graciously donated by P.L.

Test unit was sent by a website fan and was received on 09-27-05 (or "27 Sep 2005" if you prefer).

UPDATE: 00-00-00



    MANUFACTURER: Beghelli
    PRODUCT TYPE: Self-luminous "EXIT" sign
    LAMP TYPE: Tritium glow tube
    No. OF LAMPS: 14
    CASE MATERIAL: Plastic
    BEZEL: Plastic; tritium tubes protected by prismatic diffusers & plastic window
    SUBMERSIBLE: Yes, to shallow depths at minimum
    ACCESSORIES: None that I'm aware of
    SIZE: 12.750" W x 8.250" H x 2.00" D
    WEIGHT: Unknown
    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) ''EXIT'' Sign *

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