20000lm Rechargeable T6 LED MTB Bicycle Headlight, retail $10.59 (URL not known)
Manufactured by (Unknown)
Last updated 01-22-22
The 20000lm Rechargeable T6 LED MTB Bicycle Headlight (hereinafter probably just called a bike headlight for brevity sakes) is a surprisingly bright, focusable, multimode LED bicycle headlight.
It uses a high-powered (2W) Cree XML T6 phosphor white LED behind a convex (magnifying) lens; it is also focusable from a fairly narrow square spot (a magnified image of the LED's die, actually) to a wide, circular smooth beam with a very sharp perimeter.
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Charge the bike headlight first (see directly below) and THEN you can go paint the town red -- or a very slightly coolish, very pleasant shade of white in this case.
Affix this light to the handlebars of your bicycle using the rubber strap -- it's quite intuitive actally. This is one instance where the factory's failure to furnish any instructional materials didn't phase me one bit.
To turn the bike headlight on in "high" mode, press & release the circular black button located on the top of the product's body toward the rear.
To switch to "low" mode, press & release the button again.
To switch to "strobe" mode, press & release the button again.
To neutralise the bike headlight, press & release the button a fourth time.
Just like it reads on the backs of many shampiddle bottles, "lather, rinse, repeat".
In other words, pressing and then releasing the button again turns the bike head on again in "high" mode.
To adjust the beam width, just turn the barrel of the product left or right.
Left (counterclockise when looking at the product from the front) narrows the beam; right widens the beam.
The bike headlight, mounted on the handlebars of a ten-speed bicycle.
Since I don't have a bicycle, I show how I affixed it to the front of my electric wheelchair for those pesky night missions.
This product is rechargeable, so I don't have to tell you which part to remove, throw into a birdcage with all of the poopy newspaper, wait until the newspaper gets changed (which will involve disposing of the part you threw in earlier), and then rather emphatically tell you not to.
When the battery in this bike headlight starts to down the tube, disengage it from your bicycle and carry it inside, plug up the larger end of the short USB charge cable to a free USB receptacle in your Pee-Cee or Mac computer, and plug the smaller end into the female MicroUSB receptacle on the back of the bike headlight itself (pull back the orange rubber bung protecting that receptacle first if necessary).
A small red light should turn on at one end of the bung.
When that light turns yellow-green, you may unplug the cable from both ends, and reinstall the light on your bike.
This is a bicycle light/flashlight in a metal & plastic body, not a flashlight in an all-metal body that's meant to be bashed, thrashed, trashed, and abused, so I won't bash it against a steel rod or against the concrete floor of a porch, run over it with a 450lb Quickie Pulse 6 motorised wheelchair, stomp on it, use a large claw hammer in order to smash it open to check it for candiosity, fire it from the cannoñata (I guess I've been watching the TV program "Viva Piñata" too much again - candiosity is usually checked with a laser-type device on a platform with a large readout, with a handheld wand that Langston Lickatoad uses, or with a pack-of-cards-sized device that Fergy Fudgehog uses; and the cannoñata is only used to shoot piñatas to piñata parties away from picturesque Piñata Island), send it to the Daystrom Institute for additional analysis, or perform other indecencies on it that a flashlight in an all-metal or sturdier plastic body might have to have performed on it. So this section of the web page will be a bit more bare than this section of the web page on a page about a flashlight in an all-metal or exceptionally sturdy plastic body.
The bike light uses an imported Cree XML T6 LED as its light source.
Aww hell with it...since the 20000lm Rechargeable T6 LED MTB Bicycle Headlight is also intended to be used as a FLASHLIGHT for fv¢k sakes, I decided to perform the test anyway.
And the results are in, folks!
And as you can see, it passed with flying colors (or, "colours" if you're from the UK)
The purpose of The Smack Test isn't to see what kind of damage appears on the exterior of the light, it's about how well (or how poorly) the electrical and electronic elements of the light handle the instantaneous shock load (G-force) encountered in each smack.
On the evening of 01-21-22, I made use of this bike headlight on an after-dark store run, and it performed quite admirably.
Beam terminus photograph on a wall at 12" (wide).
Measures 350,000mcd (high) and 341,000mcd (low).
Beam terminus photograph on a wall at 12" (narrow).
Measures 5,580,000mcd (high) and 1,610,000mcd (low).
All intensity meassurements were pereformed on an Amprobe LM631A light meter.
Beam terminus photograph on a wall at 8 feet (wide).
Beam terminus photograph on a wall at ~8 feet (narrow).
***EPILEPSY WARNING*** Modes of the 20000LM Rechargeable T6 LED MTB Bicycle Headlight (1080p)
In this video, you can see the operational modes of the 20000LM Rechargeable T6 LED MTB Bicycle Headlight; you can also see it being "focused" to larger and smaller beam widths.
I added ***EPILEPSY WARNING*** because one of the modes of this product has flashing lights.
The bike headlight in use (1080p)
This brief video shows the 20000lm Rechargeable T6 LED MTB Bicycle Headlight in use.
Looks like I might want to direct (aim) it slightly to the left.
Since I do not own or have access to a bicycle, I affixed it to my Quickie Pulse 6 electric wheelchair.
Video was taken at approx. 5:31am PST on 01-21-22.
Spectrographic analysis of the LED in this bicycle headlight.
Spectrographic analysis of the LED in this bicycle headlight; spectrometer's response narrowed to a band between 440nm and 460nm to pinpoint native emission peak wavelength, which is 447.650nm.
Spectrographic analysis of the LED in this bicycle headlight; spectrometer's response narrowed to a band between 550nm and 570nm to pinpoint phosphor emission peak wavelength, which is 564.160nm.
The raw spectrometer data (tab-delimited that can be loaded into Excel) is at lepo.txt
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:
Test unit was purchased on Ebay on 01-17-2, and was received at 12:36pm PST on 01-20-22.
UPDATE: 00-00-00
PROS:
Very bright
Rechargeable -- never have to buy disposable cells for it
Easily-adjustable beam width
Intuitive -- very easily attaches to bicycle handlebars
Sturdy mainly-metal construction
NEUTRAL:
Seems a bit on the heavy side, but I do not consider this as a negative in this case
CONS:
MANUFACTURER: Unknown
PRODUCT TYPE: Adjustable focus bike headlamp
LAMP TYPE: High-powered (2W) Cree XML T6 phosphor white LED, small bicolor LED
No. OF LAMPS: 2 (1 ea. high-power white, small charge status indicator)
BEAM TYPE: Adjustable from narrow spot to medium flood
REFLECTOR TYPE: N/A
SWITCH TYPE: Pushbutton on/mode change/off on upper surface of product
CASE MATERIAL: Metal, plastic, and rubber
BEZEL: Metal; LED recessed behind lens for it
BATTERY: 2,200mAh 3.70 volts LiPo cell
CURRENT CONSUMPTION: Unknown/unable to measure
WATER- AND URANATION-RESISTANT: Light sprinkle-resistance at minimum
SUBMERSIBLE: ¡¡¡UN ZOMBI DEJANDO UNA CACA EN UN BOL HIGIÉNICO INUNDADO, NO!!!
ACCESSORIES: Battery (preintalled), USB-to-MicroUSB charger cable
SIZE: 43.80mm (head dia.) x 62.50mm (head L) x 80.10mm W
WEIGHT: 163.40g (5.76 oz.) incl. battery
COUNTRY OF MANUFACTURE: China
WARRANTY: Unknown/not stated
PRODUCT RATING:
20000lm Rechargeable T6 LED MTB Bicycle Headlight *
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- candiosity is usually checked with a laser-type device on a platform with a large readout, with a handheld wand that Langston Lickatoad uses, or with a pack-of-cards-sized device that Fergy Fudgehog uses; and the cannoñata is only used to shoot piñatas to piñata parties away from picturesque Piñata Island), send it to the Daystrom Institute for additional analysis, or perform other indecencies on it that a flashlight in an all-metal or sturdier plastic body might have to have performed on it. So this section of the web page will be a bit more bare than this section of the web page on a page about a flashlight in an all-metal or exceptionally sturdy plastic body.
