B07RW3GQF6 SeaLife Sea Dragon 1000F Photo/Video Light Head Power Kit (SLKIT07)

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Five Light Modes: All light functions are easily accessible with one handed operation to cycle through five light modes. The five light modes are: full power, half power, quarter power, one-second flash signal and emergency SOS signal, both at full power.
Strong Construction: The Mini 1000F light is constructed of an anodized aluminum machined body for maximum durability and corrosion resistance. The dual O-ring design ensures reliable waterproof seal down to depths of 330 ft. (100m).
Long Run Time: The light runs for 8 hours on one 18650 rechargeable Li-ion 3500mAh battery at quarter power, 4 hours at the half power setting, or 2 hours at full power. Two single-use CR123 may also be used with 4 hour run time at quarter power and 1 hour at full power.
Versatility: The compact 1000F will easily slip into your BCD pocket. The light may also be mounted to camera systems with its included YS mount adapter, GoPro camera adapter, and AquaPod underwater camera pod adapter.