The DGX Gears 4550 canister light is an excellent choice to support your cave diving, wreck diving or similar technical diving activities. The light delivers an ANSI/NEMA FL-1 standard 4,550 lumens and the 89 Wh battery pack provides up to 4.5 hours burn time in the brightest mode. The battery pack can be disconnected from the light head assembly and be used as a power bank to charge other devices because it also includes a USB-A power port.

DGX Gears 4550 Features

• Five CREE XPL-V3 LED array with ANSI/NEMA FL-1 standard 4,550 lumen @ 6500°K white daylight output at brightest setting.
• 7° tightly focused beam width
• Rechargeable lithium-ion 89Wh sealed battery pack meets all FAA air transport requirements
• 4.5 hours burn time at brightest mode (4550 lumens)
  7.8 hours burn time at medium brightness (1750 lumens)
  24.0 hours burn time at low brightness (420 lumens)
• Power On/Off and H/M/L brightness control with power on "lock" function located on light head
• LED indicator on light head provides continuous status of battery charge
  Green = Above 30%, Red = 30% to 10%, Flashing Red = Below 10%
• ANSI/NEMA FL-1 Impact resistant design with intelligent over-heat, over-discharge, and reverse-polarity protection
• A6061-T6 aluminum corrosion-resistant construction with mil-spec type III hard anodized black finish
• {48 in | 122 cm} umbilical cord with strain relief at both ends
• Multi-configuration "goodman" style adjustable hand mount for light head
• Canister quick belt mount for {2 inch | 50 mm} harness webbing
• Quality lens is two-side coated tempered glass
• Triple O-ring canister seal, IPX8 depth rated to {500 feet |150 meters}
• UL Listed charger with US two prong Type A NEMA 1-15 plug, universal 100-240V 50-60Hz input with 8.4V 4.0A 33.6W output
• Four LED indicator on battery pack displays state of charge
• USB-A port on the battery pack allows it to also be used as a power bank to charge other devices such as dive computers and cell phones

What's in the Box: The DGX 4550 light head and canister lid assembly with umbilical cord, multi-configuration goodman style handmount, battery canister with quick belt mount, battery charger, and spare o-rings for canister. To meet carrier transport regulations, the light ships as disabled with a clear plastic sheet placed between the lid electrical contacts and the top of the battery, which you must remove before initial use.

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Charging: Separate the light head assembly from the battery canister by unscrewing at the corded canister lid to expose the round DC power socket at the edge of the canister. (Note the bottom of the battery canister is permanently sealed, do not attempt to open the battery canister itself.) Press the small round button on the top of the battery canister between the DC power socket and the USB-A port; one to four green lights on the edge of the battery canister illuminate to indicate state of charge. If charging is required, plug in the charger to the battery and then plug the charger in to mains power outlet; if the wall charger is receiving mains power a red LED on the charger will illuminate. Once the battery is fully charged, the LED on the wall charger will turn green. Charging time varies considerably depending on the pre-existing charge level of the battery, typically 3 to 5 hours but can be as long as 6 to 8 hours for a depleted battery, and it's normal for the battery canister to get warm while charging. Best practice is never leave charging unattended; then once charged, unplug the charger and disconnect from battery canister.

Operation: Inspect canister body O-rings carefully for hair or other contamination. If the O-rings look dry, leave them in place but smear a small amount of lubricant on the part of the O-ring surface you can see. There is nothing special about the lubricant, any generic silicone O-ring lube used with underwater equipment will work. Screw the canister and corded lid assembly together; do not over-tighten - the O-rings make the seal. Briefly press the button on the light head once for high power on, press briefly again for medium power, press briefly again for low power, press briefly again for off. To "Power Lock" - while light is off, press and hold the button for more than 5 seconds - light will blink twice and power on will become inoperative; very rapidly double press button to unlock.

Post-Dive Maintenance: Immerse the light in clean fresh water for a few minutes after each dive and allow to thoroughly dry before disassembly. We recommend storing the battery with 30% to 50% charge level. If you do not store the battery canister and lid assembled, we recommend covering the top or placing the entire canister in a plastic bag to protect the o-rings and contacts from contamination or short circuit. Some divers like to put a drop of mineral oil on the switch but in our opinion this just "gums up the works"; we recommend simply to thoroughly fresh water rinse the light head such that the switch is kept free of mineral deposits, sand and other debris.