Thinking a bit more about this: good question!
+ Light-weight
- High-CRI
- warm white (2700/3000K)
+18650 - good price/quality ratio
Hmmm, not many tent lights with these characteristics available at the moment, I think.
R-Pal was an original and innovative design from many years ago. I suspect the R-Pal was the source of inspiration for Fenix to develop their CL25R. The R-Pal however is quite expensive nowadays, and I think it has visible PWM.
The Fenix CL25R is a solid camping light, however with 4500K certainly not warm. Some people attach filters on the outside to turn down the colour temperature into something warmer.
Gearbest then cloned the CL25R further into their Zanflare T1, which as a bonus has tint-mixing with warm white option (2700K), although not high-CRI. Some people think the T1 is great. I am not one of these people as my T1 behaved erratically from the start by developing some ghost lighting when not in use. Some others (see this review by DBSAR) reported that the 18650 cell could heat above safe levels.
Then there is also Nightcore with some light-weight camping lights; however these are cold white or perhaps at best 5000K neutral white. And many models come with built-in batteries that are not user-replaceable.
Finally there is the GoalZero lighthouse micro. Warm white. However the built-in 18650 is not replaceable. In low there is visible PWM. The USB fold out port will break off at some point in time.
In a while the BLF lantern will be available, however fantastic, light-weight it is not.