Here are the photos of the Ryobi One 18V torch 10 watt power led upgrade.
The driver fits in easily next to the on off switch.
I used a cool white 10 watt 20mm star PCB led and a matching driver. I also purchased a round heatsink from you and turned 3/4 of it down to slide into the spring as the stock bulb does.
Lastly I used a 15 degree optic for a better beam and removed the original ryobi pressed steel one.