Bearcat
Enlightened
Can this be done and if so, what amount of lumen and run-time would this form factor get?
For just a tad longer, you can get a Rebel 80 or Cree Q4 LOD CE. Runtime in a single mode light though would simply depend on how you wanted to drive the LED.
Oh, don't change anything about the Dart, except put a Rebel in and let it rip. I would love a simple extra long run-time single mode key-chain flashlight without the SOS and Flash modes.
Why would it be easier to put a Rebel into a E1 than a EO?
I believe so, as the E0 uses a 5mm LED, and the E1 uses a Nichia Power LED.
If you want just 11 lumens for ~9 hours, you may have better luck with putting a Nichia DS LED into the E0. It would be a much easier swap.