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LED WIRE WARM WHITE LED LIGHT BULB

LED Wire Warm White LED Light Bulb, retail $(Unknown)
Manufactured by (Unknown)
Last updated 10-08-20

This LED wire (COB) Warm White LED Light Bulb was purchased by a person of whom many of you will recognise: Donald Klipstein. He lives on the east coast of the United States, and has been into LED technology for at least 20 years -- probably longer.

This bulb looks like an antique Edison light bulb from the late-1800s but produces its light using 21st century technology: a group of four LED wire (COB --Chips On Board) warm white phosphor LEDs instead of the fragile carbon filament that you might expect to see in a light bulb of this style.

Unlike most LED bulbs that you can obtain today, this bulb feeds from 3 volts DC -- this can be a pair of alkaline cells in series or a "wall wart" power supply that you plug in.

This bulb has an irridescent brownish coating that gives the impression of a filament (incandescent) bulb that has seen considerable use -- that is, it has been artificially "aged" to look authentic.

Size of product w/hand to show scale

SIZE

To use the COB Warm White LED Light Bulb, screw it into a medium-base E26 light receptacle and connect it to 3 volts DC.
This bulb is polarised: the button on the bottom is (+) positive, and the screw base itself is (-) negative.

DO NOT UNDER ANY CIRCUMSTANCES screw it into a light receptacle connected to mains (110VAC 60Hz or 220VAC 50Hz household power); the bulb will fail instantly and probably rather dramatically if this is done.
You don't want baby Emperor scorpions, monarch butterfly caterpillars (larvae), or baby Sydney funnel web spiders...I mean you don't want an unwanted fire!!!

The LED wire (COB) Warm White LED Light Bulb is not self-contained and using batteries, so I do not have to tell you which part to remove, huck into the street so that a dustcart (garbage truck) will run over and destroy it, and then rather emphatically urge you not to.

Current usage measures 123.60mA on my DMM's 200mA scale; this value was measured when powering the bulb with two known-new Energizer Industrial AA cells.

Let me try on my DMM's 10A scale to knock out some of the shunt resistance from the DMM (that comes into play at lower amperage scales): ok, the meter indicates that the current usage is 420mA -- far higher than the 250mA maximum that I was told was this bulb's safe upper limit (it has been clarified that the "safe upper limit" is not specifically known, but could be close to 500mA).

The LED wire Warm White LED Light Bulb is a bulb meant to be screwed in and then not fv¢k€d with, not handled like a flashlight meant to be used every day, thrashed, bashed, trashed, and abused. So I won't slam it against a steel rod, try to drown it in the john, stomp on it, run over it with a 450lb electric wheelchair, throw it at a wall-mounted porcelain urinator to see if it smashes open (the bulb, not the urinator), or subject it to other indecencies that a flashlight might be subject to.

This bulb is made primarily of metal & glass; so it PROBABLY WILL become broken if dropped, thrown, or otherwise abused. Handle it as you would an ordinary store-bought incandescent or CFL household light bulb with a glass envelope, and it shouldn't give you any guff.

Photograph of the bulb, illuminated of course.

Photograph of the "filament" -- the four LED wires.

Spectrographic analysis of the warm white LEDs in this bulb.

Spectrographic analysis of the warm white LEDs in this bulb; spectrometer's response narrowed to a band between 440nm and 460nm to pinpoint native emission peak wavelength, which is 451.180nm.

Spectrographic analysis of the warm white LEDs in this bulb; spectrometer's response narrowed to a band between 595nm and 625nm to pinpoint phosphor peak wavelength, which is 607.010nm.

The raw spectrometer data (tab-delimited that can be loaded into Excel) is at donsbulb.txt

USB2000 Spectrometer graciously donated by P.L.

A beam cross-sectional analysis would normally appear here, but the ProMetric System
that I use for that test was destroyed by lightning in mid-July 2013.

TEST NOTES:
Unit was sent by Don Klipstein of www.donklipstein.com and was received at 3:49pm PDT on 10-06-20.

The test unit must be returned, so I'm not going to have it at my disposal for very long -- a matter of weeks tops.

UPDATE: 00-00-00

Unknown

LED light bulb

LED wire (COB) phosphor white LED

Toroidal-shaped 360° X-axis by ~300° Y-axis

N/A

Glass and metal

N/A

2x 1.5 volt cells of any size

123.60mA when used with two alkaline AA cells

Light splatter-resistant

¡¡¡HUSOOS CRISTO EN UN SILLÓN DE RUEDAS, NO!!!

None

141.90mm L (from base to tip) x 63.50mm Dia. at its largest point

44g (1.590 oz.)

Unknown

N/A

LED wire (COB) Warm White LED Light Bulb *

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