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K-LITE LED LIGHT BULB

K-Lite LED Light Bulb, retail $1.03 (http://uninex.com...)
Manufactured by Uninex (http://uninex.com)
Last updated 11-07-20

This is a household light bulb designed to be screwed into a standard E-26 (medium screw base) light socket, and powered directly from 110 to 130 volts AC 60Hz.

It features 16 SMD phosphor cool white LEDs and a milky-white diffused "bulb" like many incandescent light bulbs have; the light is radiated in a mainly toroidial ("doughnut-shaped") beam out of the entire bulb except for a ~30° region near the bulb's screw base -- but for all intents and purposes it radiates its light in a 360° spheroid region like most incandescent household light bulbs.

The color is described on the packaging materials as "daylight" with a color temperature of 5,000K.

To the eye, the light does appear to be a slightly cool-white -- it's actually remarkably close to the light produced by a standard cool white fluorescent light bulb or tube.

Size of product w/hand to show scale

SIZE

These bulbs are so easy to use, a caveman could do it!

Simply unscrew and remove the old bulb, and screw the K-Lite LED Light Bulb in its place.
Yes, it really is that easy folks!!!

Note that I did not instruct you to smash the old bulb and then carefully sweep up the sharp little glass bits and the base and have you dump the dustpan into the dustbin or empty it into the john and flush them away, hahaha!!!

This product is powered by mains ("house current"), not batteries.
So I do not have to tell you which part to remove, huck into a field crawling with hungry, hungry praying mantids or piddled-off skunks, and then rather emphatically tell you not to.

This bulb has a medium E-26 screw base, and screws directly into any American household lamp holder.
It feeds from 110 to 120 volts AC 60Hz -- which is the voltage and frequency used in north America.

THIS LED BULB IS NOT DIMMABLE!!!
If you put it on a dimmer-controlled fixture, the bulb will fail rapidly (and possibly quite spectacularly so!) You don't want baby brown recluse spiders, bluebottle fly maggots (larvae), dragonfly nymphs (larvae), or monarch butterfly caterpillars (larvae)...er...uh... I mean, YOU DON'T WANT AN UNWANTED FIRE!!!

Since this bulb was meant to be screwed in a light receptacle and not fv¢k€d with, I won't whap it against a steel rod or the concrete patio floor, try to drown it in a toliet bowl, stomp on it (or just simply step on it), run over it, or inflict other punishments upon it that might be inflicted upon regular flashlights. So this section will be rather short.

Handle it as you would an ordinary household light bulb, and it shouldn't give you any guff. If you drop it, the plastic bulb (outer envelope) *COULD* become broken (but probably won't), just like a regular light bulb except that there's no vaccum (vacumn, vaccuummnne, vacuume, vacum, vacuum, etc.) to relieve, so it will likely not make that satisfying "POP!" sound that you hear when you drop a regular light bulb on the floor and it breaks.

The top portion might very well pop off if it falls to the floor; should this occur, just pick it up and press-fit it into the bulb; just press it in until it is flush with the edge of the lower portion of the bulb.

The entire bulb operates cooler than expected; temperatures were just above ambient after more than an hour operating base-up. This tells me that the LEDs are being driven conservatively and that the driver electronics uses components that are operated well within their individual ratings.

Common sense would indicate to avoid direct exposure to water and also that this bulb should not be used with emergency exit signs or fixtures.

Photograph of the bulb, illuminated of course.
Those black stripes are caused by the camera; this is known as the, "rolling shutter" effect and occurs because the bulb blinks rapidly (120Hz).
There is no known solution -- at least none that *I* know of anyway.

Measures 46,000mcd on an Amprobe LM631A light meter.
Remember though, that this is a 360° light source, and wider viewing angles always, always, ALWAYS equal lower mcd (intensity) values!

Advertised to produce 350 lumens.
Lumens are measured with a very expen$ive instrument called an integrating sphere, and I do not own or have any access to one. So I am forced to take the packaging claims as gospel.

Spectrographic analysis of the LEDs in this bulb.

Spectrographic analysis of the LEDs in this bulb; spectrometer's response narrowed to a band between 435nm and 455nm to pinpoint native emission peak wavelength, which is 445.880nm.

Spectrographic analysis of the LEDs in this bulb; spectrometer's response narrowed to a band between 500nm and 580nm to pinpoint phosphor emission peak wavelength, which is 522.360nm.

The raw spectrometer data (tab-delimited that can be loaded into Excel) is at k-lite.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:
I purchased this at the Happy Market in Fresno CA. USA on 11-03-20.

UPDATE: 00-00-00

PROS:
Decent quality of the light (its radiation field anyway)
Very low power consumption (5 watts)
Runs cooler than expected
The price is most definitely right
Potential for very long bulb life
Easy to retrofit existing lamps and wall/ceiling light sockets with

NEUTRAL:
Possibility that the bulb's color might cause you to become piddled-off at it

CONS:
Dimmer than expected
Not dimmable

K-Lite

LED-type household light bulb w/plastic envelope

High-powered phosphor cool white LED

360° somewhat toroidial flood

N/A

Plastic with metal screw base

N/A

N/A (uses 110-120VAC mains power)

Unknown/unable to measure

Very light splatter-resistance at maximum

ZIEMNIAK MOCZU ZA POMOCA SZCZOTECZKI DO ZEBÓW, KTÓRA SPADLA W TOALECIE, NIE!!!

None

101.10mm L x 59.30mm Dia. (at widest point)

26g (0.92 oz.)

China

Unknown/not stated

K-Lite LED Light Bulb * http://uninex.com...

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