Underwater Kinetics Q40 MK2 Light

SKU: UKTMQ4MK2 MFR: UK-514630
$71.50

Key Features

  • Illuminate your dives with 250 lumens of bright, focused eLED underwater lighting.
  • Enjoy extended underwater adventures with a reliable 5-hour battery life; AA batteries included.
  • This compact, lightweight dive light weighs only 6oz, perfect for travel and easy handling.
  • Explore depths up to 500 feet with this rugged, waterproof diving light you can depend on.
  • Attach to your mask strap for hands-free use, enhancing your underwater diving experience.
  • Built with durable ABS & polycarbonate, this dive light is ready for any underwater challenge.
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Q&A

Questions & Answers

Shopper : Is it possible to have lost the light source while opening it? It won't turn on now, and there's a space between the batteries and the external lens. What does the "bulb" look like, and can I get a replacement?darrick c : Hello, yes the insides of this light are replaceable.
Luke Y : Is this light the exact same size and shape as the older version?ROBERT F : No it isn’t, the new version is 1 1/2 inches longer and a little wider.RICHARD H : The length is the same but the shape has been redesigned for easier access to the on/off switch in the back.
Shopper : Why Did You Choose This?DAVID D : Owned this light previously. Very bright and compact with focused beam. Fits nicely in BC pocket tooERIC R : have been using these for several years and the hands free option makes them pricelessMario M : I need itJames Z : Disposable batteriesBRADLEY H : Good reviews, I can get cheap AA rechargeable batteries instead of one built in.Regin J : Tried the new Mini Q40 MK2 . I was wery impressed with the light.

Reviews about this item

Review Summary

2022-12-12T16:24:47

Rated 5 out of 5

Great dive light

My absolute favorite light during both day and night dives. I had the previous model for a number of years and liked it too but it flooded. So when finding the new model with the rear switch I bought two.

Michael H.

2022-12-12T07:00:40

Rated 5 out of 5

Great light great value

Good powerful light for the price and happy with the performance. Good strong light beam. The 4 batteries will last 4-5 hours which is plenty for the 1 or 2 night dives and intermittent use during my week long diving trip. Great value and reliable. The only thing to note is that the light comes only with a strap for attaching to a mask and I added a wrist strap I had extra and used that instead. The wrist strap worked better for me to control scanning and to hide the beam when necessary so not to scare away the night life.

Lori B.

2020-09-15T04:19:34

Rated 5 out of 5

Mini Q40

Works great. I use them everyday in low to no visibility am very happy with durability and the amount of light

VAN I.

2020-07-14T21:50:36

Rated 1 out of 5

Paper weight

First use the button became stuck. Never even got in the water. Useless now

JAMES C.

2019-10-07T20:03:51

Rated 5 out of 5

Great Light

I bought this as a gift for my son, but keep borrowing it. It has worked on multiple dives. I thought it might be too heavy to use on my mask strap, however, in the water it works fine. I recently used it on a night dive and while penetrating a wreck during my wrech course. It was super handy to have it attached to my mask so that both of my hands were free to work the spool.

Brian M.

2019-04-16T14:48:31

Rated 5 out of 5

Great Light

Great light for the money on /off switch works great really good for finding those hiding critters in the reefs

REX K.

2019-02-10T17:29:26

Rated 5 out of 5

Good Lightweight Light.

Loved my light so much that my husband wanted one as well. Fits in my bc pocket easily. Power switch is well placed.

Becca P.

2019-02-01T07:36:47

Rated 5 out of 5

Mini but bright

Small but powerful. I have it attached to my bc with a lanyard. The light is easy to operate. Bright!

Israel J.

2019-01-01T10:54:48

Rated 5 out of 5

Hands free!

It is very useful when multi-tasking either at night or when deep with low light conditions. I only wish it was brighter, maybe 500+ lumens, and had spot and flood beam modes. Although the position of the on/off button is very nice, can turn it on in an instant even when my hands are kinda full.

Wang W.

2018-11-25T09:20:54

Rated 1 out of 5

Switch Failed on 2nd Dive in Cozumel

Switch failed on the second dive in Cozumel. I could have easily fixed the switch but due to design issues the failure would likely occur again. Output was OK for the torch size and AA batteries are easily found and replaced. BUT, the last thing you want to happen when abroad is equipment failure and sure enough this one let us down. The torch was returned for a refund and we switched to a Big Blue VTL3500. No more playing with these plastic toys.

Brandon H.

2018-09-11T08:55:33

Rated 5 out of 5

Great light

Excellent! Super bright.

Jeffrey F.

2018-08-09T05:16:15

Rated 1 out of 5

Switch goes bad

This light is bright for its size, but we have had consistent problems with the switch going bad on the back.

JOSH C.

2018-05-07T15:28:17

Rated 5 out of 5

Versatile light

Great for peaking into caves, crevices but also great light to use on night dives. Small enough to fit into bc pocket or attach to d-ring.

MICHAEL C.

2017-10-04T16:52:29

Rated 4 out of 5

Product is good but...

Product is good, easy to mount, and conveniently hands free lighting. * The initial UK mini Q40 MK2 that I ordered did not work so I had to send it back as an exchange for the same product. It took about a month by the time I was able to have a working light in hand. The exchange was relatively painless but I would have expected a working product from the beginning. I order a lot from Leisure Pro and this is a first for me to receive a defective product.

RICHARD H.

2017-07-16T13:34:48

Rated 5 out of 5

Nice light

Greeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeat light

Jorge H.

2017-06-26T07:12:59

Rated 5 out of 5

Great light!

Very bright bright and the push switch is a nice feature.

ROBERT F.

2017-06-07T10:39:08

Rated 5 out of 5

Great light

Great light. Everything you would expect from UK. Fits hand nice, easy to operate, and has a bright focused beam.

Paul C.

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Underwater Kinetics Q40 MK2 Light Specifications

  • Materials

    Body: ABS & Polycarbonate

  • Lamp

    eLED

  • Lumens

    250

  • Batteries

    4-AA Alkaline Batteries (included)

  • Burn Time

    5-Hours

  • Depth Rating

    500' (152.4m)

  • Attachment or Handle

    Handheld
    Mask Strap

  • Dimensions (L x W x D)

    7.5 x 1.6 x 1.4" (19.05 x 4.06 x 3.56cm)

  • Weight

    6 oz (170g)

  • UPC Code

    032705146301

1 Accessories for Underwater Kinetics Q40 MK2 Light

  • All Accessories (1)
  • Mask Straps (1)

About Underwater Kinetics Q40 MK2 Light

FEATURED REVIEWS

Great dive light

By Michael H.

My absolute favorite light during both day and night dives. I had the previous model for a number of years and liked it too but it flooded. So when finding the new model with the rear switch I bought two.

Great light great value

By Lori B.

Good powerful light for the price and happy with the performance. Good strong light beam. The 4 batteries will last 4-5 hours which is plenty for the 1 or 2 night dives and intermittent use during my week long diving trip. Great value and reliable. The only thing to note is that the light comes only with a strap for attaching to a mask and I added a wrist strap I had extra and used that instead. The wrist strap worked better for me to control scanning and to hide the beam when necessary so...

View full Review

Meet the Underwater Kinetics Mini-Q40 MK2, your compact powerhouse for underwater illumination. This remarkable little dive light delivers a performance that defies its small size. Whether you're exploring coral reefs or sunken shipwrecks, the Mini-Q40 MK2 is your reliable lighting companion that won't let you down.

Operated by an easy-to-use push-button switch that works effortlessly, even with thick gloves, it emits a radiant 250 lumens for up to 5 hours. Powered by four standard AA alkaline batteries, included for your convenience, this pocket-sized powerhouse ensures you're never left in the dark, no matter your location.

Ideal for travel and extended dive trips, this lightweight gem weighs in at just 6 oz. (170 g) and measures a compact 7.5" x 1.6" x 1.4" (19.05cm x 4.06cm x 3.56cm). Small in stature, it takes up minimal space in your gear bag, making it an excellent choice for the globetrotting diver.

Illuminate your underwater world with the Mini-Q40 MK2's focused beam that slices through murky waters like a hot knife through butter. The new optics system delivers an impressive beam power, providing unrivaled visibility under all diving conditions. Use it to peer into crevices, as a focusing light, or attach it to your mask for hands-free illumination. It also comes with a mask strap holder, making it perfect for nocturnal lobster hunting dives.

Constructed from impact-resistant ABS and polycarbonate, and sealed with an O-ring for watertight integrity, the Mini-Q40 MK2 is depth-rated to 500 feet (150m). This incredible dive light, complete with an owner's guide, is proudly crafted in the USA.

Underwater Kinetics Q40 MK2 Light Features

  • Performance Never Seen from Light This Small
  • Brightness/Burn Time: 250 Lumens/5 Hour
  • Lamp: LED
  • Power: 4-Standard AA Alkaline Batteries (included)
  • Push Button Rear Switch: Easy-to-Use Even with Heavy Gloves
  • Mask Strap Included for Hands Free Use
  • Strap Makes Light Ideal for Night Lobster Hunts!
  • New Optics System for Better Visibility
  • Strong Focused Beam Cuts Thru Murky Water with Ease
  • Durable Impact Resistant Plastic Case with O-Ring Seal
  • Depth Rated: 500' (150m)
  • Dimensions: 7.5" x 1.6" x 1.4" (19.05cm x 4.06cm x 3.56cm)
  • Weight: 6 oz. (170 g)
  • Owner's Guide
  • Made in USA

Warranty Information

This product has a limited warranty of 36 months.

Key Features

  • Illuminate your dives with 250 lumens of bright, focused eLED underwater lighting.
  • Enjoy extended underwater adventures with a reliable 5-hour battery life; AA batteries included.
  • This compact, lightweight dive light weighs only 6oz, perfect for travel and easy handling.
  • Explore depths up to 500 feet with this rugged, waterproof diving light you can depend on.
  • Attach to your mask strap for hands-free use, enhancing your underwater diving experience.
  • Built with durable ABS & polycarbonate, this dive light is ready for any underwater challenge.

What's in the box:

  • Light
  • Batteries
  • Mask Strap
  • Owner's Guide
  • Underwater Kinetics Lifetime Limited Warranty