As discussed in this thread
There are several variants of these 4 × 18650, super wide angle video lights with accessory red and blue led’s.
This ScubaBoard thread reviews these
However a new type has started popping up on Aliexpress / Banggood and I am intrugued by it
They have 1 large COB led, claiming 11,000 lumens
‘URANUSFIRE’ ( 
)
‘Tactical Underwater 100m LED Diving Flashlight Waterproof COB LED 10800Lumens Photography Video Fill Light Torch 4*18650 Battery’
Does anyone have any experience with these, or COB type LED’s ?
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Bought a light for scuba diving once. Do LED's contain nicotine?