I have an "old-style" L1 and it fits the RCR123s that came with my GatLight perfectly. It's slightly brighter for a little while, but it works just fine.
Well, now I am a bit confused. Is it that the "old style" L1 will take an RCR123A, but the "new style" won't? Or, does it depend on whether the cell is protected or not? Or, does it just depend on the particular brand of RCR123A?
Thanks for the reference, whippoorwill. John @ lighthound says the L1 and RCR123As are a no-go. Such a pity. I used to have an E2L/E1L that thrived on them.