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Motion Sensing Step Light, retail $24.99 (
Manufactured by Mr. Beams™ (
Last updated 05-01-13

This is a motion-activated "stairs" light, designed to be mounted on the wall of stairwells or hallways, that automatically brightens dramatically (it glows very softly at night when in "standby" mode) when it senses somebody approaching either end of the stairwell. It is completely self-contained (battery powered); no need to have costly hard-wiring done.

It is also photoelectric - that is, it automatically turns itself off and will not trigger during the day, and turns itself on/arms itself (for the motion sensitive portion) at night.

The Motion Sensing Step Light comes in a sturdy UV-resistant ABS plastic body; its SMD white LED is protected by a transparent, water-clear plastic window (or "lens" if you prefer, even though it does not focus, defocus, or otherwise modify the light in any manner), and operates from three C cells.

This product will not become available until 05-12-08.


Feed the Motion Sensing Step Light three C cells first (see directly below), and then you can *NOT* fall down the...*thump!* *crash* {ouch!} *thump* *thump* {ouch!} {ouch!} *thump* {ouch!} *crash* *thump* *thump* {OW!!!}...stairs.

If the wall you intend to affix the Motion Sensing Step Light to is wood, start by drilling "pilot" holes with a 1/8" drill bit, positioned exactly 1.0" (2.54cm) apart. Drive the included screws into these holes, and screw them in until the bottoms of their heads protrude from the wall 1/8th of an inch - this is to allow the keyhole openings on the back of the unit to function properly.

If the wall is made from drywall (gypsum board), drill the "pilot" holes with a 3/16" drill bit first, insert the included drywall anchors into the holes, then proceed as shown above.

Hang the unit by gently pressing it onto the screw heads, orienting it so that the screw heads go into the holes on the Motion Sensing Step Light's back plate, and lower it approximately 1/5th of an inch until it stops.

Finally, if you are mounting it in an indoor location, you may use the included double-sided tape in leiu of screws.

There are no switches to fuss with or forget; once batteries are loaded, operation of the Motion Sensing Step Light is ***TOTALLY*** automatic.
To borrow a phrase from a popular infomercial, you just "set it and forget it" - it's easier than that though, as you don't have to actually "SET" anything. It comes on in "glow" (low) mode when it becomes dark, comes on in high when motion is detected (and stays on for 25 or 100 seconds), then automatically returns to glow mode. And when it starts to get light, the unit automatically extinguishes its LED and will not "trigger" when motion is detected.

To feed the hungry, hungry Motion Sensing Step Light, lift it off the wall, and turn it so the concave opening faces down.

Unscrew the two screws with a medium or large standard screwdriver, or a coin like a quarter. Remove them, and set them aside.

Remove the back plate, gently place it on the floor, and kick it down the stairs so that termites will think it's something yummy for their insect tummies, drag it to their nest, then find it unpalatable so they just squat over it and pee on it...O WAIT!!! YOU'LL NEED THAT!!! So just set it aside instead.

Remove the three used C cells from the battery compartment, and dispose of or recycle them as you see fit.

Insert three new C cells into the compartment, orienting them so that their flat ends (-) negatives face the springs for them in each chamber.

Place the back plate back on, insert & tighten those two screws you removed earlier, and hang it back on the wall.
Aren't you glad you didn't kick that back plate down the stairs with all those termites with full bladders now?

Current usage measures:

41.0 ĩA (quiescent; daytime)
  1.0mA (quiescent; nighttime)
65.0mA (full power; nighttime)

The Motion Sensing Step Light was meant to be hung up somewhere and not {vulgar term for having had intercourse} with, not a flashlight meant to be thrashed, trashed, and abused. So I won't throw it against the wall, stomp on it, try to drown it in the {vulgar term for feces}bowl or the cistern, run over it, swing it against the concrete floor of a patio, use a medium- to heavy-weight ball peen hammer to bash it open in order to check it for candiosity, fire it from the cannoņata (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), a handheld wand that Langston Lickatoad uses, or a pack-of-cards-sized instrument that Fergy Fudgehog uses; and the cannoņata is only used to shoot piņatas to piņata parties away from picturesque Piņata Island), send it to the Daystrom Institute for additional analysis, or inflict upon it punishments that a flashlight may have inflicted upon it.

So this section of the Motion Sensing Step Light's web page may appear more bare than this section of the web page on a web page about a flashlight that was born to be a flashlight and nothing but a flashlight.

When triggered by motion, the Motion Sensing Step Light turns on in high mode for exactly 25 or 100 seconds (see directly below), measured on a clock with a second hand on it.

There's a slide switch in the battery compartment labelled "ON TIME"; if the switch is set to the rightmost position, the unit stays on in high mode for 25 seconds when motion is detected; if this switch is set to the leftmost position, the unit stays on in high mode for 100 seconds when motion is detected.

I do not have stairs or a hallway here, so I cannot show you (with pictures) how it might be used with them.

Beam photograph on the test target at 12".
Measures 200mcd (standby) and 7,130mcd (motion-activated) on a Meterman LM631 light meter.

This is a very wide-angle lamp, and if I've told you once, I've told you 31,054,500 times:
Wider viewing angles always, always, ALWAYS equal lower mcd values!!!

Spectrographic analysis
Spectrographic analysis of the LED in this light.

Spectrographic analysis
Same as above; newer spectrometer software setting used.

Spectrographic analysis
Same as above; yet newer spectrometer software setting used.

Spectrographic analysis
Same as above; yet newer spectrometer software setting used.

Spectrographic analysis
Spectrographic analysis of the LED in this product; spectrometer's response narrowed to a band between 430nm and 480nm to pinpoint native emission peak, which is 455.037nm.

USB2000 Spectrometer graciously donated by P.L.

ProMetric analysis
Beam cross-sectional analysis.
Image made using the ProMetric System by Radiant Imaging.

YourTube video showing the Motion Sensing Step Light in action.
There's nothing much to see here except for a silly light brightening and then dimming.

This clip is approximately 2.3976345645 megabytes (2,557,754 bytes) in length; dial-up users please be aware.
It will take no less than twelve minutes to load at 48.0Kbps.

YourTube video showing how my Motion Sensing Step Light went down the tube.
(Update 03-10-10): It has been determined that the unit did not actually go down the tube; a defective battery {low system voltage} was to blame!!!

This clip is approximately 9.5578564354 megabytes (9,730,618 bytes) in length; dial-up users please be aware.
It will take no less than forty eight minutes to load at 48.0Kbps.

Motion Sensing Step Light and Spotlight were sent by A.F. of Mr. Beams™ on 04-22-08, and were received at 5:29pm PDT on 04-25-08.

Product was made in China.
A product's country of origin really does matter to some people, which is why I published it on this web page.

UPDATE: 03-05-10
For at least the last several months, I've been using this product as an automatic room light -- it comes on whenever I come through the door so I don't trip over cords or accidentally kick "big scary lasers" at night. I am still on the same set of C cells that I installed when it was new.
True, this is not its intended use, but it performs this job quite well!!!

UPDATE: 03-09-10
The product has now failed.
It comes on at maximum intensity, stays that way for ~25 seconds, goes to dim for ~1 second, them comes back up to maximum (lather, rinse, repeat) -- even if no motion is detected. Therefore, I have no choise but to add that dreadful "Failed or was destroyed during/after testing" icon next to its listings on this website.

It behaved this way even when I removed the batteries overnight and then repowered it the next morning.

UPDATE: 03-10-10
The unit has now begun to function properly again -- the cause was determined to be a defective C cell!!!
An email from one of the engineers at Mr. Beams™ led me to load-test the new C cells -- and one of them was found to be bad!!

Low system voltage (usually due to very weak batteries) will cause the behaviour shown in my 03-09-10 update {and the video clip} above; replacing the batteries in my unit with ones that load-tested good rectified the behaviour and the Motion Sensing Step Light now operates as intended.

To that end, the "Failed or was destroyed during/after testing" icon will be removed at once.

If your Motion Sensing Step Light misbehaves in this manner for no apparent reason, CHANGING THE BATTERIES SHOULD CORRECT THE ISSUE even if the light still appears bright.

UPDATE: 05-01-13
A couple of weeks ago, I loaned this product to a family friend who was homeless & living in his minivan -- this person was then hosed down and killed by a criminal in a hail of gunfire on 04-21-13 ; therefore, the new (but still very dreadful), "" icon will appear by its listings on this website -- denoting the fact that I no longer have it for additional analyses or comparisons.

Has reasonable intensity considering that it is fully self-contained
Motion switch really does the job
Batteries it needs are extremely common and relatively inexpen$ive

None that I have yet to find

    MANUFACTURER: Mr. Beams™
    PRODUCT TYPE: Motion-actuated "stairs" light
    No. OF LAMPS: 1
    BEAM TYPE: Wide flood
    SWITCH TYPE: Automatic day/night/motion sensitive
    CASE MATERIAL: ABS plastic
    BEZEL: Plastic; LED protected by small transparent window
    BATTERY: 3xC cells
    CURRENT CONSUMPTION: 41.0ĩA (quiescent) to 65.0mA (full power)
    WATER- AND PEE-RESISTANT: Yes (weather-resistant at minimum)
    ACCESSORIES: Double-sided tape, 2 screws, 2 anchors
    WARRANTY: Yes, but duration not stated; 30 day return policy


    Star Rating

Motion Sensing Step Light *

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