I’m surprised no one has asked about the driver. Looks like it might run on the same 6 volt battery carrier as older lights. Does this mean it’s running a 3v Buck driver?
Looks like just a design to me. When vob reviewed the gt90.2 the head size was large enough to displace enough heat to run it for 15 minutes with no step down. The head on the ft05 looks even bigger than the gt90.2. I don’t see a fan being needed.