Posted on

Buying a primary light

Choosing a dive light

As a new diver, one of the first pieces of equipment to get is a dive light. When shopping for a light there are a few factors to consider.

What type of diving do you do? Are you limiting yourself to daytime, tropical, warm water diving? Will you want to try night diving? Do you dive at home as well as on vacation? Are you an advanced technical diver or a cave diver?

Read more, we have the primary light for you.

The Agir light system

The Agir light lineup is encompasses a broad range of modular products that is suitable for all types of diving.

Our flagship, the 34 Ah 28 W LED with dual outputs is a light for the diver that needs lots of power and illumination during really long dives. The 28 W LED light head outputs approximately 4000 lumens in a tight spot with a pleasing corona. The secondary output can be individually controlled and connected to heated undergarments providing comfort during really cold dives.

At the other end of the lineup we find the convenient 2 W LED Arthur backup light. Small enough to conveniently fit into a BCD pocket, but best mounted with a clip on your shoulder strap. In between these two extremes are one of our most loved lights; the 10.4 Ah 10 W LED canister light.

The 10 W LED with the 10.4 Ah battery pack is used and loved by many divers. It demonstrates a great tradeoff between canister size and weight, light output, burn time and economy.

A modular system

The Agir range of primary lights are modular. An Agir primary light is composed of three main components; the light head, the battery pack and the lid.

Our canisters comes in four different sizes; the largest 34 Ah battery, the big 18.2 Ah battery, the 10.4 Ah battery pack and finally the 3.2 Ah battery pack for the handheld light.

We offer two (three) different light heads, first the big 28 W LED head, then the 10 W LED light head and also the 10 W LED light for the handheld convertible light.

The lids come in two sizes; 70 mm for the 10.4 Ah and 18.2 canisters, and 90 mm for the 34 Ah canister. The lid can be either the standard lid with one output or the dual output variant.

Between the lid and the light head is a cable. The cable is either a continuous cable or it can be a wet-mateable e/o connector cord.

This modular design provide a wide range of variations, in fact, 32 different lights can be put together using our light heads, battery packs and lids.

A light for every diver

The modularity means that, if you are looking for a primary light: we have it.

Modularity has a number of benefits. First of all, it means that we have the best light for you. Among all the different variations, there is a light that is tailor made just for you.

Upgrades are painless

Second, if you ever feel you need to upgrade, maybe from the smaller 10 W LED light head to the bigger 28 W LED light head, you do not have to buy a new primary light. Just get the bigger light head and connect it to your canister. If you would like to be able to swap between the 10 W head and the 28 W head, you can either attach a new lid to the new light head or you could swap the standard cables for e/o connectors on both your heads and on your lid. Each solution has its benefits.

Travelling and diving

For the travelling diver, a great solution is our handheld 10 W LED primary light combined with a cable-to-lid adaptor and a canister style battery pack. Use the smaller handheld battery pack for travel to save weight and space in your luggage. When diving at home, maybe in cold waters, use a big 18.2 Ah canister with dual outputs to power both your light head and your electrical underwear.

Replacing parts

While our lights are robust and hard wearing, sometimes, after many years of service, parts may need to be replaced. Modularity means you do not have to get a new light. Instead, for example, just switch a worn out battery pack for a new, fresh one.

Grows with you

Modularity also means that your light grows with your diving. If you see yourself mainly doing diving during vacations to tropical destinations, then get the 10 W handheld primary light to start with. It is small and light, but provide the same light output as our most successful primary light the 10.4 Ah 10 W LED light.

Whenever you feel like you want to advance your diving career and need a canister style primary light on a Goodman grip: just add an adapter and a canister and put your light head on a Goodman grip. You can now use your light as a handheld torch on vacations and you have an excellent canister light. Later on you may want a dual output lid to power heated underwear for those long cave or mine dives.


Out of all the possible variations, there is at least one that fits you. The right primary light for you is one of ours. You will not go wrong starting small: upgrading later is a breeze. And a piece worn out after years of service can be easily replaced. Investing in the Agir light system means getting the best value for your money.