Technical Description / Specifications

• High light output from the new 4 W LED
• Properly focused beam
• 27mm (1 1/16”) sealed reflector
• High reliability
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• No electronic controls
• Long Burntime
• Only 2 parts are in contact with the water, and there is only one seal
• The seal uses 2 O-Rings for added reliability
• Precision machined top quality metal internals
• Heat produced by the LED is returned to the batteries
• Textured, nonslip lampbody
• Simple switch mechanism
• Usable with primary and rechargeable batteries
• High light output from the NEW 4 W LED: Through the use of extremely high output 4 W LEDs, this lamp is much brighter compared to similarily sized halogen lamps, and has a longer burntime.

Selected LED
These premium LEDs are selected by the manufacturer to have a light output from 67.2 to 87.2 Lumens for the same power input. These LED emitters are considerably brighter than the standard LED emitter and share the same burntimes. Since these premium LEDs are not always available from the manufacturer, and quantities are very limited, Selected LED lamps are not always available for sale.

Properly focused beam
The focusing of the LED beam is tight enough to meet the needs of cave divers. Until now, no LED lamp on the market had a tight enough focus for cavediving use. This focusing was achieved through a specially manufactured reflector.
Until now it was normal for 50% of the available light not to be focused by the reflector/lens combination. This unfocused light spreads out to the sides and doesn’t do the cavediver any good. A tightly focused efficient light beam is also advantageous for normal openwater diving. High light output from the 4 W LED Through the use of extremely high output 4 W LEDs, this lamp is much brighter compared to similarily sized halogen lamps, and has a longer burntime. We provide 2 types of LED emitters: Standard Our standard LED emitter has a light output from 60.0 to 67.2 Lumens. Selected LED These premium LEDs are selected by the manufacturer to have a light output from about 240 Lumens for the same power input. These LED emitters are considerably brighter than the standard LED emitter and share the same burntimes. Since these premium LEDs are not always available from the manufacturer, and quantities are very limited, Selected LED lamps are not always available for sale. Properly focused beam The focusing of the LED beam is tight enough to meet the needs of cave divers. Until now, no LED lamp on the market had a tight enough focus for cavediving use. This focusing was achieved through a specially manufactured reflector. Until now it was normal for 50% of the available light not to be focused by the reflector/lens combination. This unfocused light spreads out to the sides and doesn’t do the cavediver any good. A tightly focused efficient light beam is also advantageous for normal openwater diving.

27mm (1 1/16”) sealed reflector
A large reflector can more efficiently focus the LEDs output than a small reflector. Many LED lamp manufacturers use a smaller, less efficient reflector/lens unit, thereby saving money. We don’t.

High reliability
Since LEDs are shockresistant, and the LED junction emits light almost forever (over 50,000 hours) these lamps are highly reliable.

No Electronic Controls
The decision to eliminate controlling electronics provides the following advantages for use as a Backup light:

• Increased Reliability - Electronics can get damaged by water or shock, and become unusable.
• Increased Burntime - An electrically controlled LED is always using the maximum power that the circuit is designed for. The advantage is constant brightness until the batteries are completely discharged. The battery voltage drops during the discharge cycle, and the control electronics will compensate this drop by increasing current to the LED. Towards the end of the battery discharge cycle the current draw is at the highest level and the batteries rapidly die with little to no warning. Without control electronics the current draw drops along with the battery voltage. The disadvantage is the LED becomes dimmer as the voltage drops. The advantage is the burntime increases dramatically. This can be an enormous advantage for a diver who needs light since the burntime provided by the electronics is no longer working against him. Due to the elimination of control electronics the lamp is capable of delivering enough light for over 8 hours.

Long burntime
Due to the use of an LED and the elimination of electronic controls, the lamp is capable of providing sufficient light for 6 to 8 hours (depending on the type of batteries you select).
Only 2 parts are in contact with the water, and there is only one seal The lamp has only 2 outside parts that are in contact with the water, and there is only one opening to seal. Each additional opening just adds an additional failure point.

The seal uses 2 O-Rings for added reliability
The only opening is sealed with 2 O-Rings, one behind the other. This reduces the possibility of a seal failure which can be caused by sediment deposited on the outside O-Ring. If the outside O-Ring seal leaks, the inner O-Ring will still be sealing the opening.

Precision machined top quality metal internals
All internal parts are precision machined. No cheap metal stampings are used. The Reflector is made from a solid piece of brass. The battery tube is made from an Aluminum tube with 2mm wall thickness and is nickel plated. The Bottom of the battery tube is made from a solid piece of stainless steel. The contact spring is also stainless steel.

Heat produced by the LED is returned to the batteries
Usable battery capacity is temperature dependent and drops with low temperatures. If you can use the waste heat of the LED to warm the batteries the available battery capacity increases. This is why this lamp returns the heat produced by the LED to the batteries.

Textured, nonslip lampbody
The lampbody is turned from a solid rod. The axial channels and roughened middle section make the lamp easy to hold with wet hands and gloves. The rubber hood on the lamphead is also nonslip.

Simple switch mechanism
The lamp is switched on by simply turning the lamphead. This joins the reflector to the heat-conducting battery tube which completes the circuit and also conducts heat to the batteries.

Usable with primary and rechargeable batteries
The lamp can be used with 3 Alkaline „C“ Cells or with 3 NiMH Rechargable batteries. (If you use NiMH batteries, you should ask the battey manufacturer if a hydrogen catalyser is required. Use if NiMH batteries is, of course, at your own risk.) Due to the extremely long burntime compared to normal lamps, one set of alkaline batteries will probably last for a whole vacation’s nightdives. Therefore you don’t need to provide the care needed to properly maintain a set of rechargeable batteries.

Size

• Largest diameter (at the Lamphead) 48mm
• Diameter of the tube 37mm
• Total length 215mm
• Weight without batteries 300gr