The Rofis R2 meets most of those requirements. I am not sure if the tailcap locks out power though.

Not sure what it does for OTF lumens. I would be surprised if it does not step down after a few minutes. Most well designed lights in this size do.

https://www.amazon.com/Rofis-Multifunctional-Rechargeable-Adjustable-head-Lightweight/dp/B0796SPSC6/ref=sr_1_1_sspa?ie=UTF8&qid=1520613940&sr=8-1-spons&keywords=rofis+14500+flashlight&psc=1