did my burn test the other night in my dunk tank, on high they were still on after 5 hours. should be plenty of power for all day diving and then recharging over night.
It most certainly bumped down to something other than high since it claims only 2 hours on high.
Assuming they died after 5 hours which gives a benefit to lumen output, and assuming they are using the highest end cells which gives the pack a watt hour rating of 150wh.
Average consumption is 30w.
Assuming they have the absolute best binning efficiency on the LED's, then the average light output for that duration is 5000 lumen.
Using real numbers, the pack is probably 125wh with 100wh usable, assuming to give lumen bump the pack lasted 5 hours, then you are consuming 20w on average, and with normal emitter efficiency I would assume no better than 2500 lumen average output over the course of those 5 hours.
Assuming they bumped down to low, after 2 hours, and low is the remaining 20% of the pack
100wh usable, 2 hours is 50w average consumption
Not possible to have over 10,000 lumen average light output using the absolute best conditions possible
More likely 5000-8000 lumen average lumen output during that burn duration.
That is a LOT of light, just not possible for that light to put out as much light as they claim.
If the light put out a constant 30,000 lumen, under ideal conditions and fully depleting the battery pack, it is not possible for that pack to run for more than 45 minutes. More realistically it would last for 20 minutes.
go in expecting a 5000-10000 lumen light, and come out really happy. Go in expecting a 30,000 lumen light, go home sadly disappointed.