djozz
(djozz)
2
The 18650 variant of the LT1 does not exist (yet), so you will have to deal with what imperfect lanterns are currently available, the Zanflare T1 is pretty ok from what I hear.
Diffusers on top of a flashlight work well too, and I doubt they are ineficient compared to a dedicated lantern, actually I think they are more efficient.
I have the feeling that if you wait a year, all kinds of LT1 variants will hit the market, including a smaller 18650 version.