Looking for a rechargeable fully waterproof construction light.

Hey there!

A friend of mine is looking for a specific kind of light.
He cleans industrial sized greenhouses at night for a living.
In 2 years the greenhouses are not allowed to keep the lights on at night because of light pollution so now he’s looking for a sollution.
Due to the amount of water that comes down with this job, normal waterresistant equipment tend to die pretty soon with him.
Due to the water, it is also not safe to work with lights that need to be powered by the mains. He stands on a moveable platform to do his work which is flooded with water so 1 failure and he’ll get electrocuted. Due to the fact that the platform is moved to a new spot everytime he’s done with 1 spot, it’s also not possible to fix a lightsource away from the water.

Thus he’s looking for a rechargeable construction light to light the place where he’s working.
Most of the items I can find are IP65 and this probably won’t survive long.
I did find underwaterlighting, but they are all mainspowered.

The only thing that comes close that I could find is the scangrip nova 20W C+R.

It has an IP67 rating, which might be enough (although he had ipx8 equipment failed on him)
We tried to order it from some local sources to test if it will suit his needs, but all of them can’t deliver them anymore and won’t get them anymore so he’s afraid that when time comes, they are not around anymore.

He thinks 10W will do, as he will probably mount 2 on each side of the platform. He also needs 8H runtime, but has no problem in buying 4 and switch when the first ones are empty (because most I can find claim around 4H runtime)

So, do you guys know of anything else that I can recommend to him? Budget is no problem. If it’s the holy grail and perfectly fits what he needs he’s prepared to pay the bucks for it (It will probably have it’s limits, but that’s for him to decide. And for reference, the scangrip goes for 200-250 euro)