Free Shipping and No Hassle Returns
Free Shipping
We offer free shipping on orders over $199.*
No Hassle Returns
Don’t like it? Send it back. It’s that simple.*
Same Day Shipping
Most orders ship same day if placed by 5PM EST (M-F)
*Restrictions Apply. See Details »
Model#: STMN66323

What are the different product conditions?

Brand new items;Full manufacturer warranty available
Manufacturer inspected, repaired and tested items; CPO 60 day money back guarantee
Open Box
New or Recon items with possible minor cosmetic damage; CPO 60 day money back guarantee
Returned items inspected, repaired and tested by CPO technicians; CPO 60 day money back guarantee

Streamlight 66323 MicroStream Alkaline Battery-Powered LED Pen Light (Red)

  • Streamlight 66323 MicroStream Alkaline Battery-Powered LED Pen Light (Red)
This item is no longer available.
Give us a call, we're here to help.
Add to Cart


Utilizing the latest C4 LED technology this ultra compact and lightweight flashlight is optimized for output and run time.
  • Corrosion and water resistant
  • Machined aircraft-grade aluminum alloy
  • Type II MIL-spec anodize plating
  • C4 LED technology, impervious to shock with a 30000 hour lifetime
  • Unbreakable polycarbonate lens for durability
  • IPX4 rated for water resistant operation, all openings are O-ring sealed
  • 3 ft. impact resistance tested
  • Powered by one AAA alkaline battery
  • Push button tail switch for momentary or constant on operation
  • High strength "break away" safety lanyard
  • MicroStream Alkaline Battery-Powered LED Pen Light (Red) - 66323
  • Unbreakable Pocket Clip
  • Lanyard
  • AAA Battery


Cordless: Yes
Length: 3.5 in.
Weight: 1.04 oz.
Batteries Included: Yes
Battery Type: AAA
Body Diameter: 0.6-in
Finish: Red
Lens: Polycarbonate
Light Output: 28 Lumens
Light Source: C4 LED
Run Time: Up to 2.25 Hours



5.0 / 5.0
2 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Would you recommend?
Yes (2)
Ergonomic Design (2)
Yes, I would recommend this to a friend
Ergonomic Design
A Great Little Flashlight
I purchased a few of these Streamlight Microstream flashlights about a year ago. I must admit that I was very hesitant once I realized that it operated on a single AAA battery. In the past I have found AAA battery powered devices to not perform as desired.

Well, let me tell you when it comes to this flashlight nothing could be further from the truth. This little baby is a performer, I have used it on a daily basis for the past year.

I did make a performance improvement on this light by switching to the Energizer Ultimate Lithium AAA battery. This model battery claims to offer 8-times the life of a typical alkaline battery. In my experience in this flashlight they have lasted at least 10-times the life of the alkaline.

The Ultimate Lithium are of course more costly than the alkaline batteries, they cost about 4-times as much. But, keep in mind that I am getting 8-10 times the life over the alkalines, therefore based on the hours of use they are actually cheaper.

If you are considering purchasing one of these lights don't hesitate, you will be happy with it. Let me caution you, if you want to save yourself some hassle don't order just one, if you do you will be purchasing more in short order. I just ordered four more for gifts, that's what brought me here today.

December 9, 2011
Yes, I would recommend this to a friend
Ergonomic Design
Excellent light
This light is not only water resistant, it is fully waterproof. Mine went through the washing machine twice and came out perfect.
December 20, 2014

Questions & Answers

Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 1 question Browse 1 question and 1 answer
How do I change the led me n this light
Dale on Aug 1, 2016
BEST ANSWER: For technical support, contacting Streamlight directly would be your best option (800-523-7488)