Incandescent "Blacklite" Light Bulb, retail $TBA
Manufactured by (Unknown)
Last updated 06-15-10

This is an incandescent "blacklight" light bulb.

Its primary purpose is to cause "glow-in-the-dark" (or "blacklight") posters to spring to life. However, I really can't recommend these bulbs for three primary reasons:
  • They burn extremely hot!!!
  • UV output is horribly low (please see spectrographic analyses below)
  • Lifetime is rather short because the filament is deliberately overdriven.
It comes equipped with a medium screw base (size E26 or E27) aka. "Edison base".

To use these bulbs, just replace any light bulb in an open area (away from paper, cloth, plants, lampshades, etc.) with an E26 or E27 medium screw base with one of these bulbs.

They operate at very high temperatures (measured at 463°F {239.45°C} after 5 minutes!!!), so you really must keep them away from flammable materials...after all, you don't want baby tarantulas, mosquito wrigglers (larvae), or carpet beetle grubs (larvae) don't want an unwanted fire!!!

This product is designed to be operated from "house current" (110 volts to 130 volts AC 50Hz or 60Hz), not batteries of any type, so I do not have to tell you which part to remove, huck down the basement stairs into the room crawling with thousands of hungry, hungry termites, and then rather emphatically tell you not to.

This is an incandescent "blacklight" light bulb, 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 toylet bowl or the cistern, run over it, swing it against the concrete floor of a patio, 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 flashlights 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.

The bulb itself (the pear-shaped outer envelope) is very likely made out of Wood's glass; which appears as a deep royal purple when viewing white light through it. Wood's glass is special barium-sodium-silicate glass incorporating about 9% nickel oxide. It is a very deep violet-blue glass, opaque to all visible light rays except longest red and shortest violet. It is quite transparent to violet/NUV/UV radiation in a band between 320nm and 400nm with a peak at transparency of 365nm; and a fairly broad range of infrared and the longest, least visible red wavelengths.

Temperature of the bulb itself (the outer glass envelope) measures the following:

66°F (18.89°) cold
282°F (138.89°C) after 30 seconds
463°F (239.45°C) after 5 minutes

I was going to destroy it by letting it burn for several minutes, and then throwing a bit of water on it (capturing video of it and posting it here), but I'd no longer have it available for additional testing or analyses if anybody requests it, so that idea rather quickly went to pot.

Photograph of this bulb operating.

Spectrographic analysis
Spectrographic analysis of this bulb.

Spectrographic analysis
Spectrographic analysis of this bulb; spectrometer's response narrowed to
a range between 340nm and 525nm to show UV and NUV emission.

USB2000 spectrometer graciously donated by P.L.

Test unit was sent by a website fan in 2002 or 2003.

UPDATE: 00-00-00

    PRODUCT TYPE: Incandescent "blacklite" light bulb w/medium screw base
    LAMP TYPE: Incandescent bulb
    No. OF LAMPS: 1
    BEAM TYPE: Somewhat toroidal (360°X, ~300°Y)
    CASE MATERIAL: Glass (possibly Wood's glass)
    BEZEL: N/A
    CURRENT CONSUMPTION: Unknown/unable to measure
    WATER- AND URANATION-RESISTANT: Light splatter-resistance at maximum
    WEIGHT: Unable to weigh (no scale at my disposal)
    WARRANTY: Unknown


    Star Rating

Incandescent "Blacklite" Light Bulb *

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