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Mr. Beams MB852 Indoor Wireless Slim LED Light with Motion Sensor Features, White, 2-Pack

355 customer reviews
| 14 answered questions

List Price: $27.99
Price: $24.99 & FREE Shipping on orders over $35. Details
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  • Extremely bright LED provides 35 lumens of light with minimal power consumption. MB852 is two (2) individual units of the Mr Beams MB850 LED Slim Light
  • Sophisticated motion sensor combined with a light sensor allows this slim LED light to turn on only when it is dark and only when motion is detected, auto-shut of can be set at 20 or 60 seconds
  • Simple wireless installation in minutes using using two-sided tape or mounting screws (both included)
  • Slim profile LED light hides anywhere. Works great as an under cabinet light, gun safe light, work bench light, Closet light, or pantry light
  • Unit easily slides out of mounting bracket to change batteries (4 AA Batteries per unit-not included)
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$24.99 & FREE Shipping on orders over $35. Details In Stock. Ships from and sold by Gift-wrap available.

Frequently Bought Together

  • Mr. Beams MB852 Indoor Wireless Slim LED Light with Motion Sensor Features, White, 2-Pack
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Total price: $86.18
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Technical Details

Color: White | Size: 2-Pack
  • Battery Operated

Product Description

Color:White  |  Size:2-Pack

Product Description

The MB852 Wireless Motion Sensing LED Slim Light 2-Pack is the newest addition to the Mr. Beams line of intelligent LED Battery Operated Lights. This incredibly bright light allows you to illuminate any area of your kitchen, closet, garage, basement, tool shed or workroom wirelessly. Intelligent motion sensor activates the powerful battery-powered LED to give you motion activated illumination whenever you need it, while avoiding unintentional activations. When you are done the light shuts itself off automatically. Put one under the kitchen or cabinet to light your counters for a safer work space. Stick one next to your workbench to make grabbing a tool from the garage that much easier. Install at the base of a closet to make those tough to find items instantly appear. The MB852, which is the size of a smartphone, is an efficient and unobtrusive solution to add lighting to difficult areas where you never could before. Under cabinets, shelves, bookcases, work benches, sheds, storage rooms, crawl spaces and more, will now be much safer and more accessible with the MB852. The MB852 is installed by attaching the removable outer case to any surface with two mounting screws or with two-sided tape (both included). Installation takes minutes and can be done by anyone – no electrician required. Once the outer case is attached, simply slide the MB852 in place and you have bright light for over 30 hours on a single set of batteries. 4 AA batteries per fixture (Total of 8 needed - not included) provide 35 lumens of bright white light that covers over 10 square feet. Product Includes: 2 MB 850 White LED Slim Lights, 4 Mounting Screws, 2 Pieces of Two-Sided Tape, Under Cabinet Mounting Kit and 1 Instruction Manual.

Seller Warranty Description

1-Year Manufacturers Defect

Product Information

Color: White | Size: 2-Pack
Technical Details
Part Number MB852
Item Weight5 ounces
Product Dimensions4.4 x 2.6 x 2 inches
Item model numberMB852
Batteries:8 AA batteries required.
Power SourceBattery-Powered
Voltage6 volts
Item Package Quantity1
Type of BulbLED
Luminous Flux40 lm
Special FeaturesBattery Operated
UsageIndoor use only
Batteries Included?No
Batteries Required?Yes
Average Battery Life30 hours
Warranty Description1-year warranty against manufacturer defects
Additional Information
Best Sellers Rank #13,118 in Home Improvement (See top 100)
Shipping Weight6.4 ounces (View shipping rates and policies)
Domestic Shipping Item can be shipped within U.S.
International Shipping This item can be shipped to select countries outside of the U.S. Learn More
Date First AvailableAugust 13, 2012
Warranty & Support

Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.

From the Manufacturer

Mr Beams Wireless LED Slim Task Light

The Mr Beams Wireless LED Slim Task Light is a bright battery-powered motion sensor light that attaches anywhere for instant bright light without wires. Attach under a cabinet, in a pantry, under a shelf, in a closet or utility room, as a task light or inside a drawer--it's the same size as a smartphone for easy placement. The LED light turns on when it detects motion and then turns off automatically. Mr Beams offers simple installation with no wiring and no electrician needed.

Slim Task Light Features

Motion Activation and Auto Shut Off

The Slim Task Light instantly turns on when it detects motion from as far as 5 feet away and automatically shuts off 20 or 60 seconds after motion stops. The bright LED provides 35 lumens of light.

Activates Only in Low Ambient Light

The Slim Task Light has a photocell inside that activates the LED when it is somewhat dark to conserve battery life. The light should be installed in a space that is fairly dark. It does not have to be complete darkness as the light sensor will enable the light if the detected light level is low (with a light intensity below about 10 lux at the light).

Recommended Applications

The Slim Task Light provides bright, clear light where you need it, when you need it. One unit can light up to 10 square feet of counter space. It is perfect for lighting kitchen counters and cupboards, inside cabinets, closets and armoires. Its low-profile design hides the unit while providing hands-free light for your kitchen, pantry, closet and storage areas. It can also be used as a task light allowing easy installation under shelves anywhere you need additional light, such as work benches, desks and storage areas.

Tips on Operation

Installation under a cabinet or shelf can be done by first installing the mounting plate with the provided screws or double sided tape. The double-sided tape is strong enough for permanent installation or you can also use the provided screws. After your light is installed in its permanent location, the motion sensor will trigger the light as soon as movement is detected. The Mr Beams Slim Task Light will automatically shut off when after a period of time of no motion.

Key Features / Technical Specifications

Bulb type: LED

Bulb color: Neutral white

Bulb life: 50,000 hours

Bulb strength: 35 lumens

Light range: 10 square feet

Motion detection range: 5 feet

Power source: 4 AA-cell Alkaline batteries per light (not included)

Dimensions: 1.0 x 2.6 x 4.4 inches

Weight: 7 ounces

What's in the box?

  • Two MB850 Slim Task Lights (white)
  • Two pieces of double-sided adhesive
  • Four screws and anchors
  • User manual

Customer Questions & Answers

Customer Reviews

Most Helpful Customer Reviews

84 of 92 people found the following review helpful By the guru on September 28, 2012
Size: 2-PackColor: White Verified Purchase
I was tired of tapping my hardwired under-cabinet lights with wet or messy hands while cooking, baking, or preparing any kind of food over my counters. Even more annoying the under cabinet lights built with my kitchen have three settings. The first tap is very dim - I cant see anything so I have to tap the lights again for the bright setting, but if I accidentally tapped to fast they lights would go to off (setting #3). They were nice at first but the appeal quickly wore off because I was unhappy with the functionality. Plus I think they are halogen, not LED.

The options in the wireless under cabinet lighting arena are fairly limited. Most of the lights you have to tap, click, or wave your hands right under the light to again be disappointed with the light output. I tried a few including the hockey puck Dragon Light by Sylvania, They weren't for me so they were returned to Stop and Shop.

I have a few Mr Beams lights for the backyard so naturally I was curious as to how these would perform, WOW. I can see and I have light exactly when I need it without having to touch anything, make a mess, or shake hands with the invisible man under my cabinets. When you approach the counter or even the middle of your kitchen the lights will turn on after sensing your motion. I can walk up to the sink to wash my hands or do the dishes and I don't have to turn any lights on. I can use the cutting board and have enough light to prepare food. These lights are small but they pack a serious punch in the light department.

The other part I thoroughly enjoy are their sleek look. I had visitors over last night and they asked "Where did you get those!?!" - extra cool points for me. They have a nice wow factor.
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37 of 40 people found the following review helpful By wogan TOP 500 REVIEWER on November 17, 2012
Size: 2-PackColor: White Vine Customer Review of Free Product ( What's this? )
What a good idea. These lights work on batteries - 4 AA each. They can be mounted with screws (included) or double sided tape (also included). You can set them for a short time on by an internal switch and also by placing the sensor in front or back - how sensitive it is for motion. They are easy to install, with the exception of sliding the cover off and on, but it gets easier, each time it is done.

The obvious place to use them is under kitchen cabinets for more light. We have used one for a dark corner where the coffee maker is - a great help early in the morning; but there are so many other possibilities - under a bathroom cabinet over a sink might be one and then the place we used ours. We have a media cabinet where I literally have put a flashlight in order to see what the settings for recording programs and working with the various gizmos down there are. Well with this under the shelf... voila as soon as my hands go under to put in a DVD or try to set recording time there is light - wonderful!
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33 of 38 people found the following review helpful By LoriAnnR VINE VOICE on December 29, 2012
Size: 2-PackColor: White Vine Customer Review of Free Product ( What's this? )
4/4/15 - After using this product for about 2 1/2 years - I wanted to update my review. I changed the "star" rating from 1 to 3. Please see the post that I recently responded to regarding the limitations with this light and additional observations through the years (where it's mounted, overall lighting in the room, etc). Although the lights did not totally meet my lighting expectations (if you're hopeful that you're getting comparable lighting as hardwired under cabinet wiring - you'll be disappointed), these lights are providing illumination in the darkest corners of my kitchen (although one light is more sensitive and still turns on with more frequency therefore draining the batteries faster). I think the key to getting the most satisfactory lighting experience is to NOT place them too close together and to move their location (further back under the cabinet if mounted under a kitchen cabinet) to ensure that the wireless device is not turning on by merely walking through your kitchen.

Although this is not a perfect product, if you take the time to experiment with where you mount the light, you may find that it works reasonable well. Users may want to use a heavy-duty tape to temporarily mount the light before using the included mounting tape (which is not reusable) to determine the best location that is not being triggered by shadows or other issues that may impact the lights ability to sense motion.


Contrary to the many popular reviews - I found this product to be seriously lacking in the quality control department. I used these lights under kitchen cabinets to illuminate two dark areas in the kitchen.
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17 of 19 people found the following review helpful By E. M. Compton on January 6, 2013
Size: 2-PackColor: White
I live in an area where we have pretty regular power outages in the winter time due to weather and so we've become accustomed to doing all kinds of things in the dark or by candlelight. I actually ordered these to go under my kitchen cabinets to shed some light on our cooking activities and for that they work AWESOME!
However I really wish these just had a simple switch to turn them off to save batteries when our power is on because every time we walk into the kitchen they turn on. We've had these less than three weeks and they are already going dim, it's a hassle to put batteries in them when the power goes out so I really with they had an on/off button on them for that. Make sure you keep batteries on hand if you're putting them in a spot where they'll be going on and off regularly, like a kitchen or hallway.
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Mr. Beams MB852 Indoor Wireless Slim LED Light with Motion Sensor Features, White, 2-Pack
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Price: $24.99
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