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Princeton Tec

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List: $22.99

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About Princeton Tec, Tec-40 Flashlight

With the same ruggedness and rubber over-mold as the Impact XL, the Tec 40 with halogen bulb provides a warmer light underwater. This handheld is great for backup, or as a primary daytime light, as the warm light is phenomenal for restoring lost colors on the reef. With a classic dive light look and feel, the twist bezel activated switch prevents accidental on/off. This compact unit provides the highest power-to-weight ratio of any light in its class. The non-slip rubber grip ensures you'll be able to securely hold the light, even if you're diving at 330' (100 meters

The Halogen Lamp produces 28 Lumens of Brightness and provides a visible light beam to 354.3' (108 meters) on land. The light is powered by 4 AA Alkaline Batteries (included) that provide a 5 Hour Burn Time with a Focused Narrow Beam. The Tec-40 weighs 6.38 oz. (181 g) with batteries, comes with an Adjustable Wrist Lanyard, is Depth Rated to 330' (100 meters) IPX8, is made from high impact resistant polycarbonate plastic and rubber comes in multiple color choices and an owner's manual.

The Princeton Tec, Tec-40 Flashlight is commonly used for Close-Up Viewing, Night Diving, Recreational, Safety Backup and more. The Princeton Tec, Tec-40 Flashlight is most used by customers who consider themselves to be a Advanced, Advanced Diver, Beginner, Casual/ Recreational, Divemaster, Recreational Diver among others. The Princeton Tec, Tec-40 Flashlight is popular because customers like the following qualities of the Princeton Tec, Tec-40 Flashlight: Compact, High Intensity, Long Bulb Life, Reliable, Well-Focused.

Warranty Information

This product has a limited lifetime warranty.

Princeton Tec, Tec-40 Flashlight Features

  • Princeton Tec, Tec-40 Flashlight
  • 28 Lumens of Brightness
  • Lamp: Halogen Bulb
  • Burn Time: 5 Hours
  • Power: 4 x AA Alkaline Batteries (included)
  • Twist-Activated Switch Prevents Accidental Turn-On/Off
  • Compact Design
  • Highest Power-to-Weight Ratio of any Light in its Class
  • Weight: 6.38 oz. (181 g)
  • Great Back-Up Night Dive or Primary Day Light
  • Focused Narrow Beam
  • Depth Rated: 330' (100 meters), IPX8
  • Durable Non-Corrosive Polycarbonate Plastic Body
  • Light Visible Distance: 354.3' (108 meters), On Land
  • Adjustable Wrist Lanyard
  • Available in Multiple Color Choices
  • Owner's Manual

Princeton Tec, Tec-40 Flashlight Customer Reviews Powered by TurnTo®

Review Summary


(based on 19 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


Great little light!!

Great little light


Most Liked Negative Review


Fine until it flooded.

Decent little halogen light, but it flooded and got ruined during first week of fairly simple dives in Coz. Glad others have liked it, but I can't recommend it.

Reviewed by 19 customers

Displaying reviews 1-5

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LIght Burned


from Doral, FL, US

The light lasted only one dive. In the second dive the light bulb was burned. Waste of money. The replacement bulb costs 50% of the initial value.


you get what you pay for, just spend more


from Monterey Bay, CA, US

I didn't really like this flashlight. It smells nice for some reason, probably the only thing good about it, funny how I should be rating its value as a flashlight, not as potpourri. The light is yellow, not white, it's really not bright at all, and is a really mediocre backup light. This should not be used as primary, you won't be able to see much at all. To get the most use out of this, when your primary light fails, use this light to get oriented and find your equipment, such as the power-inflator, and then safely ascend. That's all this light is good for- finding your own equipment and ascending. I would not recommend continuing the dive, or using the light to find your way back before ascending, no, just ascend and end the dive. You need something better, a backup light that can help you find your way back underwater. I would not recommend this, you really get what you pay for and in my opinion, just pay more and get something actually reliable and useful.


Do not purchase


from Guam, Guam, GU

I bought this light to take with me to Palau and not only was it not bright at all (honestly, when I turned it on I could never tell when it was on), but the flashlight flooded with water after about 3 dives and I could no longer use it. So now I have a broken flashlight. I do not recommend purchasing this light.


Great little light!!


Great little light




Very nice havn't dove with it yet but happy with the quality and the service recieved so far.

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Questions & Answers Powered by TurnTo®

Questions about this item:

Shopper  Why Did You Choose This?
PETER M  Inexpensive backup light, or compact light to carry on any dive (you never know what you will find in those little nooks and crannies!).
mark c  reliable and bright for night dives in the cold waters of new england
TIMOTHY H  Great secondary light!
NEAL R G  great backup light. great price
FRANCISCO J U  nice price
GUY K  Size, price
FRED M  I thought it would be nice but... with the technology now... this is best used in the car at night or during a rainy day.
JOSHUA H  Fits in a BC pocket. Good as a last resort backup.
RICK T  Good back up light
JEFFREY K  This is a great little light to use as a back up for recreational diving. It is small and light weight and resonably bright for it's size. Good value.
RICHARD W  My other one got broken
L B  Can the overmold handle be removed?
DARREL P  The overmold isn't designed for removal, but like anything that's an overmold, with enough effort I'm sure it could. My question would be why, as in the water it's the perfect grip. Last thing you want on a cenote or night dive, to lose your grip on the light.
L B  I'm not a diver but have an older Tec 40 without the overmold. I was hoping to get another just like it but it looks like it has been discontinued and only overmold models are now sold.
Ted S  need a light for general reef diving, etc. in Belize first week of June. Is this good for crevice lighting, etc.?
JOSHUA H  It's better than nothing, but wouldn't count on it lasting very long. Not very bright, either.. It is small and fits in a BC pocket well, though.
JEFF J  I dive in the dark waters of Puget Sound and this light works for me to find fish on the wall and wreck dives here. It is small enough to make it easy to carry and has plenty of power. I actually prefer it to my C-4. You may also find it handy in Belize if you happen to loose power like we did in the Yucatan.
MARTIN M  Good light for peeking in holes and under ledges, and a backup light for night dives. I like a bigger light for primary night dive light.
Ted S  Thanks a lot guys. I appreciate the prompt feedback. At this price I picked up a couple (one for me and one for my son) and will give them a shot. Has anyone here dived Belize?
MICHAEL W  It's agood quality light but since it has a screw bezel to turn the light on and off. You have to screw it to a point where the light goes off and then just a little more or the light might come on by it self if stored in a bc pocket other than that it's a great lite
WALTER H  Great for general reef diving. It's compact and the price is just right. the LED is bright, but the beam is not adjustable. I would say perfect for Belize. Though you may want a bigger light with a wider beam for the Blue Hole. cheers!
ROLLIN E  During daylight I really don't see much benefit to this light. Its good for pointing out something you are trying to highlight for your buddy, but doesn't do much for general illumination. The Princeton TEC 400 has a really bright beam, and is only slightly larger. The Princeton TEC could be your primary dive light, and it actually does illuminate crevice during daylight hours. Hope this helps! Enjoy Belize!
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