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Underwater Kinetics

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About Underwater Kinetics Sunlight SL4 Dive Light

The SL4 has to be the smallest and brightest 4 "C" cell dive light ever made! It emits a narrow and penetrating beam, which allows you to seek out unique marine life found under ledges. It also works well when attached to protective head gear in technical diving applications. The SL4 is great as a photo spotting light or to illuminate gauges and dive tables. Light fits neatly in a BCD pocket so it's always ready for use with its 5.5 watt high pressure xenon filled lamp. Tough, non-conductive ABS and polycarbonate plastic construction will not corrode, dent or freeze to skin in cold weather, and it comes with an adjustable rubber sleeved lanyard.

The SL4's Xenon lamp produces 113 lumens of brightness with a precision machined aluminum reflector that gives a tight 8° degree beam angle. The light has an 804' (425 meter) beam distance on land. To reduce glare and protect the light, the SL4 comes with a molded rubber bezel cover. The rotary switch is easily activated with the thumb and index finger for single hand operation. The Light is powered by 4 x C"-cell alkaline batteries (included) with a burn time of 4 to 5 hours. The light measures 6.3" x 1.8" x 2.5" (16 x 4.57 x 6.35 cm), weighs 15 oz (425.24 g) and is depth rated to 500' (152.4 meters). The SL4 is available in multiple colors, includes an owner's manual, is proudly made in the USA and is covered by a limited lifetime warranty.

Warranty Information

This product has a limited lifetime warranty.


Underwater Kinetics Sunlight SL4 Dive Light Features

  • Underwater Kinetics Sunlight SL4 Dive Light
  • Smallest & Brightest 4 "C" Cell Dive Light Ever-Made!
  • Emits Narrow & Penetrating 8° Degree Beam
  • Beam Distance: 804' (425 meter) On Land
  • Great for Attachment to Protective Head Gear in Technical Diving
  • Great for Photo Spotting Light or Illuminate Gauges & Dive Tables
  • Fits Neatly in BCD Pocket
  • 5.5 Watt High Pressure Xenon Filled Lamp
  • Tough, Non-Conductive ABS & Polycarbonate Plastic Construction
  • Will-Not: Corrode, Dent or Freeze to Skin in Cold Weather
  • Adjustable Rubber Sleeved Lanyard
  • Lumens: 113 Lumens of Brightness
  • Precision Machined Aluminum Reflector
  • Molded Rubber Bezel Cover: Reduce Glare & Protect Light
  • Rotary Switch: Easily Activated, Single Hand Operation
  • Power: 4 x C"-Cell Alkaline Batteries (included)
  • Burn Time: 4 to 5 Hours
  • Depth Rating: 500' (152.4 meters)
  • Dimensions: 6.3" x 1.8" x 2.5" (16 x 4.57 x 6.35 cm)
  • Weight: 15oz (425.24g)
  • Available in Multiple Colors
  • Owner's Manual
  • Proudly Made in the USA
  • Limited Lifetime Warranty

Underwater Kinetics Sunlight SL4 Dive Light Customer Reviews Powered by TurnTo®

Reviewed by 2 customers

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Bright, compact, reliable


from Pensacola, FL, US

Perfect for slipping in the BC pocket for daytime dives where a light might allow a look into a deep recess. I use this for both primary and backup lights at night, since the bright beam really improves focusing attention on what is hiding on and under the coral or in the wreck.


Good light


This is a nice compact light. The flat shape fits easily into your BCD pocket. The beam is tighter than my Princeton Tec 400 and it is maybe just a bit brighter. It is easier to get in and out of my BCD pocket than the Princeton. My wife really likes the size and weight too. The slightly lighter weight makes it a good choice for traveling. The batteries are a little tricky getting in, but no worse than my NiteRider dive light. I would prefer that it had a magnetic switch, although the mechanical switch seems rugged enough. The switch placement on the front of the light make it a little awkward to use at first until you get used to it. It is bright enough to be used as a primary dive light in clear water or as a good backup in lower vis diving. It would probably be adequate as a third or forth backup light for overhead environment diving too. It's size also makes it a great light for using on daytime dives when you want to look under a dark ledge to see who's hiding or those late afternoon dives that almost turn into night dives. If you are traveling, I would recommend buying a spare bulb to take with you. This light gets pretty warm out of the water. If you travel with it, pack the batteries separately so it will not turn on accidentally in your dive bag and cause a problem. You can also find a good LED replacement bulb on one of those famous (infamous?) online auction sites that is a lot brighter than the OEM bulb. Typical rugged and reliable UK quality. This light offers a very good value.[...].

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Questions & Answers Powered by TurnTo®

Questions about this item:

Sandy K  What size battery does this take ?
Diana K  This light uses 4C Alkaline / LR14
Shopper  how many lumens?
JEFF R  I gave it to a friend who put me up in Hawaii for a week. He used it at midnight fishing for squid in 6 to 8 foot of water and seemed happy to have it. I don't know how many lumens anymore. It was worth the money.
JEFF R  I bought it for a trip to Hawaii and gave it to my Hawaiian friend. He liked it and uses it at night for spearfishing squid. I don't know how many lumens it has anymore. We swam in about 6 foot of water with it on the east side of Oahu at midnight. He never complained about it although he thought it was small at first. Once in the water he said it worked pretty good.
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