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Streamlight MicroStream Personal EDC Flashlight - C4 LED - 45 Lumens - Includes 1 x AAA (66318)

Streamlight MicroStream Personal EDC Flashlight - C4 LED - 45 Lumens - Includes 1 x AAA (66318)
Streamlight MicroStream Personal EDC Flashlight - C4 LED - 45 Lumens - Includes 1 x AAA (66318)
Streamlight MicroStream Personal EDC Flashlight - C4 LED - 45 Lumens - Includes 1 x AAA (66318)
Streamlight MicroStream Personal EDC Flashlight - C4 LED - 45 Lumens - Includes 1 x AAA (66318)
Streamlight MicroStream Personal EDC Flashlight - C4 LED - 45 Lumens - Includes 1 x AAA (66318)
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Streamlight MicroStream Personal EDC Flashlight - C4 LED - 45 Lumens - Includes 1 x AAA (66318)
Streamlight MicroStream Personal EDC Flashlight - C4 LED - 45 Lumens - Includes 1 x AAA (66318)
Streamlight MicroStream Personal EDC Flashlight - C4 LED - 45 Lumens - Includes 1 x AAA (66318)
Streamlight MicroStream Personal EDC Flashlight - C4 LED - 45 Lumens - Includes 1 x AAA (66318)
Streamlight MicroStream Personal EDC Flashlight - C4 LED - 45 Lumens - Includes 1 x AAA (66318)
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| Reg. Price $29.43
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Streamlight MicroStream LED Penlight

The MicroStream LED pen light features a super bright, high flux, 1/2 watt LED Corrosion and waterproof construction with an unbreakable polycarbonate lens and pocket clip. Rubber push button tail cap "on-off" switching. Provides up to 45 Lumens for up to 2 hours and 15 minutes. O-ring sealed. 3.5" long and includes (1) AAA alkaline battery.


  • Compact, waterproof construction withstands tough work environment
  • LED has a 30,000 hour lifetime so it never needs to be replaced - saves user money on bulb replacement costs
  • Proprietary Micro Optical System (MOS) for optimized output (super bright beam) and run time
  • Shockproof - drop test verified above the industry standard of 6 feet
  • Unbreakable pocket clip and ring for easy storage/attachment


  • Power Source: 1 x AAA (Included)
  • IPX Rating: IPX-4 (Protected against splashing water from all directions)
  • Impact Resistance: 1.82 meters (6 ft.)
  • Brightness Output / Runtime: 45 Lumens - 2 Hours 15 Min.
  • Peak Beam Distance: 38 meters (124.7 ft.)
  • Dimensions:
    • Length - 3.5" (88.9 mm)
    • Diameter - 0.6" (15.2 mm)
  • Weight: 1.04 oz. (29.5 g)

US shipping warning
Runtime (Hours):-2.25---
Output Modes:Single Brightness Level
Compatible Batteries:1 x AAA
Batteries Included:Yes
Included Accessories:Batteries, Pocket Clip
Flashlight Usage:Penlights
Throw Distance (Max):38m
Switch Location:Tailcap
Product Certifications:ANSI, IPX-4
Warranty:Battery Junction 30-Day Warranty, Streamlight Limited Lifetime Warranty
Return Policy:Battery Junction Return Policy
Primary Material:Anodized Aluminum
Product Weight:1.04oz
Product Dimensions:3.5" (L) x 0.6" (Diameter)
Country of Origin:US
30 Reviews
83% (25)
17% (5)
0% (0)
0% (0)
0% (0)
83% Recommend this product (25 of 30 responses)
By Lance Green
Cedartown Ga
August 13, 2017
great light
the best light i have found. use it daily in fire service and around house. have had one going on 4 years now
Proscompact, very bright, lite weight, battery holds up well
Consnothing to complain about
May 19, 2017
Great little light
This light is super easy to carrier everyday the battery seems to last and the clip will hook on to the bill of your cap
Prossize and brightness
Consnone for me
By Lewis
Rogers, AR
April 3, 2017
Handiest EDC Flashlight
This is the most convenient EDC light I have ever had. I really like the size. The battery life is great. I read some reviews that said the on/off button was hard to press. I find that is a benefit for me becauseI do not have to worry about the light getting accidently turned on in my pocket. Another nice feature is that this light is small and light it is easy to hold in my mouth (not recommended, but it works for me) and it works great on a cap bill or hat brim. Great choice for EDC. I love it.
ProsSmall and light. Long battery life.
January 26, 2017
EDC light
Have carried one of these for the last few years, small enough to fit in watch pocket of jeans, really good power for the size, cheap enough to replace w/someone "borrows" it. Two-way clip is good for hat, cuff, clipboard. I buy several at once, great for Secret Santa, stocking stuffers, last-minute office gifts. Also will survive multiple trips through the washer/dryer.
ProsPowerful for size, small enough to be available at all times. Spare endcap switch cover a big plus. Two-way clip very versatile.
ConsEndcap switch initially needs coaxing, OK after first few uses.
By Mark
Exton, PA
January 20, 2017
Nice light
Good for the price.
Conson low mode
By Keri
Alexandria, LA
January 19, 2017
Great little flashlight
My son loves flashlights. I bought him this one for Christmas and he was thrilled. Very bright. Now I have to get one for my husband.
By Steve
October 29, 2016
The best $16 you will ever spend
I've been carrying this flashlight for years and absolutely couldn't live without it
Prossmall, light, bright, cheap and batteries last forever
By Ian
October 25, 2016
One of my favorite EDC lights.
Love this little guy. Gives me enough light to do tasks at night and the reverse pocket clips is a life saver when I need both hands free, just clips onto my hat and I have a headlamp! It's small and light enough to carry on my pocket and not bother me. I do wish the pocket clip were sturdier. I have lost it a few times because the pocket clip slid off my pocket and in between chairs. The tail cap is a bit hard to press but not really an issue for me, but may be for others.
ProsLightweight, Small, Bright, Reverse pocket clip is useful when you need both hands, Momentary on.
ConsTail cap might be hard to press for others, Pocket clip could be sturdier so it won't slip out of your pocket.
By Mike
New York
October 10, 2016
Best EDC flashlight I have ever owned!
This is hands down the best every day carry flashlight I have ever owned. I was heartbroken when I lost my first one and immediately ordered two more! It's small, bright and the pocket clip is in the right place to make it easily accessible. it gets unbelievable battery life from one AAA! Not only have I recommended this to a friend, I have given them as gifts!
ProsSmall size, very bright, great battery life.
By Mike
Dallas TX
September 22, 2016
Perfect Pocket Light
This light fits perfectly into your pocket and can be clipped onto your cap bill for use as a headlamp.
ProsSmall but bright
By Blackhawkxx
S.W. Pa
July 20, 2016
Good and bad
For me, any small light must have a good pocket clip so I can hook it on the inside of my pants pocket. Can't stand to have it loose in the pocket. This light has the best clip of all the lights that I have. The light beam its self is OK, no better or worse than my other single aaa lights. The rear activation button is a annoying problem. It is so hard to turn on or off that it almost takes one hand to hold the light and the other to push the button. The product does seem to be high in quality.
ProsGreat pocket clip. High quality.
ConsVery hard to use on/off button.
By Rick
Virginia Beach, VA
May 3, 2016
Best mini flashlight
This is one of the most useful flashlights I have ever used. It is small enough to carry everywhere you go. The light is very bright and runs a long time on one AAA battery. This is my go to flashlight for most applications.
ProsSmall, batteries last a long time, very bright light.
By Gian Burrasca
"out there"
February 25, 2016
Five-year review: excellent!
This is a splendid little light that I have had for at least five years, several drops, and even a few trips through the washing machine by mistake. Because of its compact size, it has been clipped to the pocket of my jeans every day, and has become the sort of handy tool that makes me wonder how I ever got along without it. It fits in my hand perfectly, so that I can use my pinky to cover the end and dim the light if all I need is a slight amount. One AAA battery lasts at least six months, and this unit gives out as much as a big ol' Maglite used to provide back in the day.
ProsCompact enough that you can always have it clipped to your pocket and ready to use, and use your pinky as a dimmer. Pretty bright for its size, and low battery consumption.
December 6, 2015
By Robert
Sioux Falls, SD
June 4, 2015
Terrific EDC light!
I have several MicroStreams! I think they're one of the best values out there in small EDC lights. They have a very good clean spot with an excellent balance between spot and spill. The color of them is overall very good (although my newest one is biased a bit more towards cool/blue than my other ones). The switch is excellent and very durable; my oldest one has been used hard for several years and still works fine. The finish is holding up very well, too. The two-say clip is excellent and versatile. For carry you would normally use it lens down but the S-shaped clip can be reversed to clip to the brim of a hat or ball cap. The size is perfect. It's one of the smaller AAA lights I've used. There are brighter lights out there but the MicroStream offers a good balance between output and battery life. I run lithiums in mine and usually get a year of EDC use between battery changes. I'd estimate a Lithium cell to provide about three hours of steady light, depending on temp, etc. Lastly I appreciate that Streamlight throws in a lanyard loop and a spare rubber boot for the clicky switch. That's a nice bonus that should keep the light going for several years. This is a great light and a great value. No point in carrying junk when you can have something like this for well under twenty bucks!
Pros* Good output * Water proof * Excellent shock resistance * Superb reflector with very clean beam * Highly functional pocket clip * Very compact * Nice finish * Includes extra rubber boot for clicky
Cons* Could be brighter I suppose * Clip isn't removable
By Brandon Tatum
Athens, GA
March 26, 2015
Great flashlight
Very durable and reliable flashlight. Bright, but not excessive. Battery life is good and one 1 AAA. Highly recommended!
By Hartley
Phoenix, AZ
January 6, 2015
Great Pocket Light
I've owned (and lost) a number of these over the years - good thing the price is so reasonable.. Nothing fancy, won't blind anyone, but plenty of light when you need it the most - and you'll have it because it is small enough to carry everywhere.
By Tucker
Adel, GA
December 30, 2014
Great EDC light!
Great light!
By Kenny
Wichita, Kansas
October 18, 2014
Very nice little light! Someone once said "the light that will do you the most good is the one you have with you." This light is very easy to have with you when you need it. I really like the two way clip. You can have it in your pocket or on the bill of your cap for hands free use. Good job Streamlight!
ProsSmall, easy to carry, light weight, two way clip.
New Berlin, WI
October 17, 2014
Carry everywhere
I have this in my pocket every day for a couple of years. I have not had trouble with accidental activation carrying this way. Having RP low vision problems, I am always in need of a bright light source. I have used it for dropped items to working on machines to reading menus in dark restaurants. I use rechargeable batteries and they have good life for just one AAA..
ProsHolds up over time and usage.
By Timothy
Schleswig, IA
October 5, 2014
Did you ever own something that just 'worked'?
That's the Microstream. I have owned Microstreams since they first came out. Like all Streamlight lights, it is well built and well designed. It is amazing how much light it can put out for a single AAA flashlight. The relatively deep reflector plays a part there. The beam pattern is nice, with few to no artifacts.I have EDCed this light for almost ten years now (not the same one, they keep running away from home!), and have no plans to switch to a different one.
ProsWell Built Inexpensive, especially for the quality Two-way pocket clip Bright Good run time, especially with lithium primaries
ConsOn/off switch is a little stiff. I liked the version 1 switch better, but I guess people had an issue with it being too easy to turn on inadvertently..
By Steven
Millerstown, PA
September 16, 2014
Amazing throw for such a tiny light
I've had one of these for some time. In terms of lumens, it's no brighter than one might expect, but the reflector design is exceptional, resulting in a nice concentrated beam that will reach out across a room in the dark to check window locks, ceilings, or whatever you need to see. The beam is cleanly transitioned to a bright center, with no dark shadows or irregularities. Like all small, low-powered lights, it excels in totally DARK areas, as any ambient light will compete with it and cause your eyes to adjust, making the flashlight less effective. It will make it seem dimmer to your eyes. A battery lasts a fairly long time considering how much you get in terms of throw distance. It's also a well-built, tough little light. The rubber switch cover is still intact on mine despite between 2 and 3 years of use. It is very small, so it can be carried in a pocket with no hassle at all. The pocket clip works well and mine has held up just fine. Highly recommended. The best AAA light I've used.
ProsSmall size Excellent throw Clean beam transition to a bright spot - no shadows or irregularities Good pocket clip Gets a lot of time out of one AAA battery
ConsDoes not come with a sheath Brightness limitations inherent with size constraints
By R.D.Roberts
Bakersfield, California
September 12, 2014
Streamlight Microstream LED 66318
I work graveyard shift at a hospital and need to check patient's ID bands. The Microstream is perfect. Small enough to carry in pocket and provides more than enough light. Very well made. Tailcap switch easy to push for momentary light, takes a bit more effort to click for constant light. Replaced my Streamlight Stylus Pro which I like very much but my sweetie said it was tearing my pocket. Win, Win: I get to buy another flashlight and it will hopefully keep her happy. Have not had it long enough to comment on battery life, switch longevity, etc. but its a Streamlight. Good enough for me.
ProsSmall Well made Streamlight
ConsSwitch needs firm push for constant on mode
By Frank
W Alexandria, OH
May 30, 2014
Super bright
Easy pocket carry and pretty bright far a small light
ProsLow price
ConsTail switch will be the first failure after a year or so
By Joshua
Lake Orion, MI
May 25, 2014
Just What I wanted!
I needed a smaller flashlight for EDC and this is exactly what I was looking for! Great Product!
ProsSmall, Bright, AAA.
ConsNone as of now.
By fred
July 9, 2013
great light
im a mechanic and the stream light microstream is a great light it so light in weight that I can hold it in my mouth while using both hands to work on machines
By Adam
June 10, 2011
An amazing little light
I have ordered several of these lights over the last month because anyone that sees it wants it and for the price on battery junction you just can\'t beat it. It\'s a perfect light for carry in your pant pocket or shirt pocket. My wife also wanted one for her purse. Overall i rate it a 5. I have not found a deficiency in it if keep in mind it\'s size.
By Chris
March 1, 2011
No Brainer
This is a perfect every day carry - simple and tough, its rare to find a small light with a rear clicker switch....its only 20 lumens, but that is plenty for most uses....if you have only one light, you could do worse than this little light that fits in your pocket, very light....match it with some rechargable AAAs and you are in business, never ran mine with Lithiums, maybe even brighter?
By HTran
February 11, 2010
Tiny, Tough, Bright!
Incredible light for its size and weight. The light runs on a single AAA battery but is brighter than my Maglite that uses two AA batteries! Just like the reviewer before me, I accidentally put the light through a wash and dryer cycle... and it still works! I love this light.
December 8, 2009

Streamlight MicroStream Personal EDC Flashlight - C4 LED - 45 Lumens - Includes 1 x AAA (66318)

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