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Streamlight 66318 MicroStream C4 LED Pen Flashlight

4.7 out of 5 stars 1,670 customer reviews
| 25 answered questions

List Price: $28.56
Price: $16.87 & FREE Shipping on orders over $35. Details
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  • Features a super-bright, high-flux, 1/2-watt LED and has a lifetime of up to 30,000 hours
  • Consists of micro optical system that facilitates optimized output and run time
  • Waterproof construction with an unbreakable polycarbonate lens as well as pocket clip
  • Ultra-compact at 3-1/2 inches in length
  • Features a tailcap switch for simple one-handed operation
141 new from $14.81
Special Shipping Information: Due to federal and international regulations, this product can only be shipped within the continental United States.

$16.87 & FREE Shipping on orders over $35. Details In Stock. Ships from and sold by Amazon.com. Gift-wrap available.

Frequently Bought Together

  • Streamlight 66318 MicroStream C4 LED Pen Flashlight
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  • Streamlight 66118 Stylus Pro Black LED Pen Flashlight with Nylon Holster
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  • Stanley 66-344 4-in-1 Pocket Screwdriver
Total price: $39.80
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This item: Streamlight 66318 MicroStream C4 LED Pen Flashlight
Customer Rating 4 out of 5 stars (1670) 4 out of 5 stars (2432) 4 out of 5 stars (2341) 4 out of 5 stars (4688)
Price $16.87 $18.44 $12.55 $39.25
Shipping FREE Shipping FREE Shipping FREE Shipping FREE Shipping
Sold By Amazon.com Amazon.com Amazon.com Amazon.com
Batteries Required Y Y Y Y
Power Source Battery-Powered Battery-Powered Information not provided Battery-Powered
Item Weight 0.13 pounds 0.1 pounds 0.02 pounds Information not provided
Length 0 inches 5.3 inches 4.13 inches 5.91 inches
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Product Description

Streamlight
The MicroStream LED pen light features powerful LED technology
Streamlight MicroStream C4 LED Pen Flashlight

The MicroStream is a compact single AAA alkaline battery powered LED flashlight designed for use in all markets. It features a push button tail cap switch, momentary or constant on operation, a combination pocket/hat clip for convenience, and amazing brightness and run time for a light of its size and price. The aluminum housing with Type II Military Spec anodizing helps make the light extremely durable and abrasion resistant. Utilizing the latest C4 LED technology, this ultra compact and lightweight flashlight is optimized for output and run time.

Output and run time for Streamlight MicroStream LED Pen Light
Output and run time
Additional Features
  • Most models meet applicable European Community Directives
  • Includes battery and unbreakable, removable pocket/hat clip
  • All openings are O-ring sealed
Bright and Powerful LED Technology

Featuring C4 LED technology for extreme brightness and shockproof with a 30,000 hour lifetime, the MicroStream LED pen light provides up to 683 candela peak beam intensity, 28 lumens, and a beam distance of 52 meters.

Powered by one AAA alkaline battery (included in purchase), the MicroStream LED pen light has a run time of 2.25 hours.

Built to Last

Built for durability, the MicroStream LED pen light features a corrosion resistant machined aluminum alloy case with a Type II MIL-Spec black anodized finish. Its unbreakable and scratch resistant polycarbonate lens is O-ring sealed. Rated IPX4 for water resistant operation, the MicroStream is also 1-meter impact resistance tested.

Weighing 1.04 ounces with the battery (included in purchase), the MicroStream LED pen light measures 3.5 inches in length with a body diameter of 0.60 inches.


Product Details

Product Warranty: For warranty information about this product, please click here. [PDF]
  • Item Weight: 2.1 ounces
  • Shipping Weight: 3 ounces (View shipping rates and policies)
  • Domestic Shipping: Item can be shipped within U.S.
  • International Shipping: This item is not eligible for international shipping. Learn More
  • Origin: United Arab Emirates
  • ASIN: B00143JZ08
  • Item model number: 66318
  • National Stock Number: 6230-01-583-9046
  • Average Customer Review: 4.7 out of 5 stars  See all reviews (1,670 customer reviews)
  • Amazon Best Sellers Rank: #188 in Home Improvement (See Top 100 in Home Improvement)
  • Product Warranty: For warranty information about this product, please click here. [PDF]


Important Information

Brightness
28

Customer Reviews

Top Customer Reviews

I own many flashlights, and this is by far my favorite using a 1xAAA format. The brightness is exceptional for the size and weight. I believe the 20-lumen rating is accurate, by comparison with many other lights I own. I also own the larger 2xAAA version of this light (Streamlight Stylus Pro), and the microstream is almost identically bright. Of course, the 2xAAA version has longer battery life, by more than a factor of 2 because of circuit efficiency and battery-capacity variance with discharge rate.

The switch type is my favored "forward" clicky, which means you can push it slightly to get a momentary-on function. Some other lights use a "reverse" clicky, which doesn't turn on until you click and release.

The one thing I dislike about both of these lights is that the pocket clip rotates with the threaded end cap, badly scratching the finish when you remove the cap to replace the battery. You can avoid this by placing a piece of cloth between the clip and flashlight body before turning the cap, but you have to think of this before first disassembly or it's too late.

Also, the clip exerts enough sideways pressure on the light body that you must be very careful to avoid cross-threading when you reinstall the cap onto the body.
13 Comments 281 of 290 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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I've had this light for about a week. I bought it with the intention of leaving it in my backpack (a smaller replacement for an aging mini-maglite). Well, the maglite is still in my backpack- the streamlight stays in my pocket. It is small and lightweight enough to be carried un-obtrusively. I'm amazed at how bright it is, and everyone who has seen it has wanted one. Great product, great price.

Update- six months later- still love it, probably more now than when I wrote the initial review. I use this daily, for so many things it's really hard to describe how functional this light really is, it's great!
1 Comment 133 of 137 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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As a Police Officer for nearly 18 years now, and just about all of that time spent on 2nd shift, in the same Beat, I have had many flashlights over the years, but none have compared to the versatility of the Microstream from Streamlight!! This has been my favorite flashlight, Hands Down!! It has very good output for its size and one of my favorite things about this little light is that it takes a AAA Battery, instead of 3 or 4 of those little watch batteries, or some other off size battery that is difficult to find. The "S" Clip is also a Great addition to this light!! I can clip it on my pocket and take Reports at night, or clip it on my hat when walking through the woods looking for a lost child. I also use it to search under seats of cars or in tight spots. It is really great for finding fingerprints on windows too!! I have also accidentally ran my through the washing machine several times over the past couple of years, and it keeps going, and going, and going...Whenever a Rookie Officer is assigned to work in my Beat with me on a daily basis, I always buy them a Microstream as a "Welcome to the Hood" gift, and show them how useful this light is, because I know that they will get as much use out of this light in their career, which is just beginning, as I have got out of it during my career, so far...I Highly recommend this light for anyone who is looking for a small, versatile, reliable, powerful, little light!! Oh...something else that I have not seen anyone else mention yet...I believe that all Streamlight Flashlights come with a limited Lifetime Warranty, which covers everything except the battery and signs of abuse!!
6 Comments 142 of 150 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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Verified Purchase
I really like this light. It is compact and can be worn in a front shirt pocket like a pen and has a "pen" clip for this.I actually wear it in the right corner of my back right pocket again taking advantage of the pen clip and it does not interfere with taking my wallet in or out.

It has a very, very bright white light which you can use with a momentary push of the on/off button on the end of the light (like a clip pen) or turn it on continuously by fully depressing the end of the pen.

It is a well tooled piece of equipment with a flat black metal finish that while not coarse is not slick either so is easily gripped and handled.

It uses a single AAA battery and has a reportedly long battery life.

I have not exhausted the first triple A battery yet despite using it often in the last month plus I have had it.

I really like it and plan to purchase one for both my son, daughter and father.
3 Comments 78 of 82 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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I bought many LED flashlights over the years, often skimping on the price and buying some knockoff from the E..y auction site only to have them die on me after a month or so. In the end, it cost me a lot more to buy cheap gear than to buy the right thing from the start.

This is a great little LED flashlight. It is BRIGHT, usable, solid
and good construction. You won't go search and rescue in the woods
with it but you will enjoy this one around the house or around the camp
when outdoors.

Note: it IS very bright and projects light at a surprisingly long distance. A month ago a transformer blew up in the electrical pole
over by my neighbor's house (The poles are in the back yard here).
When the electrical company came by, I just used my flashlight to show
them the busted transformer from the street (the next door house,
over the house at the end of their back yard which would be at least
100 feet from where I stood).

Highly recommended!
- Christian
1 Comment 43 of 45 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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Streamlight 66318 MicroStream C4 LED Pen Flashlight
This item: Streamlight 66318 MicroStream C4 LED Pen Flashlight
Price: $16.87
Ships from and sold by Amazon.com
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