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Princeton Tec

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About Princeton Tec, Eco Flare

A vital part of any outdoor enthusiast's equipment bag, the Eco Flare can be set on constant, high-output mode for use as an area/personal locator light, or on flashing, red Ultra-Bright LED mode for low-visibility, dark nights. The Ultra-Bright LED will burn in excess of 500+ hours on 2 (included) AAA alkaline batteries. The Eco Flare can also be attached to your dog's collar for easy identification in low light conditions.

Light comes with a built-in clip and lanyard for attachment to gear or pet. The LED provides 10 lumens of brightness and the light weighs 1.48 oz. (42 g) with batteries. Light is available in multiple color choices, is made from high impact polycarbonate plastic, is Depth Rated to 330' (100 meters) and comes with an owner's manual.

Warranty Information

This product has a limited lifetime warranty.

Princeton Tec, Eco Flare Features

  • Princeton Tec, Eco Flare
  • Constant, High-Output, Incandescent Mode
  • Flashing, Red Ultra Bright LED Mode
  • 10 Lumens of Brightness
  • Burn Time: 500+ Hours
  • Power: 2 x AAA Alkaline Batteries (included)
  • Great for Pets!
  • Depth Rating: 330' (100 meters), IPX8
  • Construction: Impact Resistant Polycarbonate Plastic
  • Weight: 1.48 oz. (42 g) with Batteries
  • Wrist Lanyard
  • Built-In Utility Clip
  • Available in Multiple Color Choices
  • Owner's Manual

Princeton Tec, Eco Flare Customer Reviews Powered by TurnTo®

Review Summary


(based on 41 reviews)


of respondents would recommend this to a friend.

Ratings Distribution

  • 5 Stars



  • 4 Stars



  • 3 Stars



  • 2 Stars



  • 1 Stars



Most Liked Positive Review


Nice compact little tank marker

I like Princeton Tec equipment, so I didn't hesitate to pick up a couple of these for us to use as tank markers on night dives. They are simple and easy to operate, and priced right! Haven't taken them on a dive yet, so we'll see how they hold up. Of note, I think they are slightly negatively buoyant. It's also worth noting that to switch from constant on to flashing red, you have to change the bulb. That's not clear in the description.


Most Liked Negative Review



Just received a second replacement Eco flare and like the first there doesn't seem to be an incandescent function. The product description says the unit has both a flashing function and a krypton bulb for continuous output. At this point only the flashing function works ... Frustrating.

Reviewed by 41 customers

Displaying reviews 1-5

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So close to a good idea


from Columbia, SC, US

Bigger than you'd expect. The ring the lanyard isn't marine grade and rusts. The solid white or blinking red light feature needs to be clarified. It doesn't do both. It does one or the other. You also have to install the appropriate LED light into the flashlight. You can unscrew it just enough to dive and not have it blink, but sometimes pressure will make it contact and light up anyway if you're not careful.


Effective tank marker


from ramsey, NJ, US

Easy to use, just twist the top to turn on and off. Good overall tank maker. Comes with a red LED blinker bulb.


nice light


from Foxborough, MA, US

I really like this light! We attach to our tanks for night diving. Gives everybody an idea of where we are while diving. Not too bright to be obnoxious or distracting. Great price and comes with an extra bulb and lanyard.


great light


from Portland, OR, US

I have purchased many of these lights over the years and have found several uses for them beyond diving. They are perfect marker lights for walking our dogs at night, and I always have a pair of them in my hunting pack for emergency situations. They are very durable except when they are subjected to the jaws of a young Lab ;-)


Small, simple and robust


from Buenos Aires, Capital Federal, AR

This small flashlight is very simple in its operation, with power by adjusting the thread of his head. It comes with a flashing red light and fixed light white one. I changed the red LED and put the fixed white light because I need that soft light for night diving and use it both on and off the water. I have another with very visible red LED on the agua.No emits a very bright light, not for that, but grants a soft ambient white light within about a meter and a half (5 feet), is strong, cheap, simple and durable, as water leakage prevention, I put silicone grease in the screw head yo'ring. Very good product.

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Questions & Answers Powered by TurnTo®

Questions about this item:

Shopper  Why Did You Choose This?
Gena B  It seems like the best fit for my first night dive!
Hanford G  I like night diving and this came with a spare white LED that is non-strobing which is nice when i want to use it as a glow stick...nice all around flare...
ALAN C  Nice small tank light used on night dives. I often clean and lubricate o-ring seal with silcone grease at every battery installation. Do NOT over tight lens may cause cracks in lens cap.
Border Services Connor U  Best light for marking, highest battery life
PETER M  Why fill up the landfill with chemlights? Great marker for night dives - just attach to tank valve.
mark c  reliable and the red blinking LED is bright for night dives in the cold waters of new england.
Paul K  Had previously owned same product. Reliable and functional for night divingâ?¦I secure it to my tank as it blinks on and off, my dive buddy knows where I am! Susan McGraw Keber
CHUCK C  Mistaken purchase.
DAVID B  Works well as a tail light
DAVID B  Works well as a tail light
DAVID B  Works well as a tail light
FRANCISCO J U  is nice for a night dive it flashes and you can atach in any place of your geear
WILLIAM D  A gift to be used in conjunction with the other two lights on night dives.
PAUL R  Safe and small dive safety light for night dives. Paul PADI Rescue Diver
Vincent C  Is this U.S. Coast Guard Approved to replace pyrotechnic hand held flairs?
Peter V  NO. It is a tank marker light for diving.
Hollie M  Just put in batteries and nothing is happening. Is there something else I need to do as well?
Roger L  3 items to look at: 1 - Batteries installed correctly in battery housing (+ & -) 2 - Light module only works one way. If light does not turn on, reverse the position of the light module in the battery housing 3 - Unsure that the lens is tightened down all the way to activate the light
Hollie M  Thanks everyone! Problem solved. Bulb was faulty. When I put in the other one it worked.
DAVID S  You need to twist it down like most of the underwater lights. Battery reversed, or dead I had a couple dead ones in past. Great light I have had several last long enough for 4 or 5 battery changes or 4 to 5 years. Keep an eye on the oring you can get at your local Ace hardware usually. Good luck and happy diving
KENNETH F  I had no problem with the 2 that I bought. Make sure the batteries are inserted in the correct directions.
TERRY S  Make sure the batteries point in opposite directions. A common problem over time is the contacts in the bottom corrode so you can put a small piece of aluminum foil in the bottom for a better contact. Terry
DON M  Did you try reversing the battery position the lamp is polarity sensitive, also wipe the lamp contacts with a paper towel dipped in alcohol to be sure you have a clean contact area. Lastly does the internal assembly make good contact with the batteries?
DAVID C  Make sure batteries are fresh and thy are installed the right way and to turn it on you need to twist it all the way down
Hollie M  Thanks. Did all that already. Tried different batteries as well. Tech support said it must be faulty.
DAVID C  Then if it does not work then probably bad bulb.
WILLIAM M  screw the top down until it comes on (if i remember right)...I gave this away as a gift. Check polarity on batteries?
Hollie M  Thanks. Did all that already. Tried different batteries as well. Tech support said it must be faulty.
WILLIAM M  well that is a bummer. Sorry. Dive well:-)
JUAN C  Light is triggered by pressure so you'll have to acre the top in tightly to test it.
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