Go look at fenix online. They are all waterproof and my pick would be a tk22 v2 or a pd40v2. Then buy a battery charger off eBay and some orbtronic 21700 batteries from orbtronic.
I run a 9 year old tk22 on 18650 batteries and my last set of batteries lasted me 7 years and several hundred (thousands?) cycles. For a $15 battery you can’t go wrong.
I’m tempted to upgrade the torch myself. Last night one of my drillers bought the pd40 so I’ll wait a week to see how good that 3,000 lumens really is before I spend some money. Here’s a review for that light.
https://youtu.be/8qFDHd4Goe0
The charger will run you about $20-25 on the big auction site. I’ve been using a nitecore intellacharger charger for ten years and it’s topping up some 18650’s behind me as I type.