Based on my impression, I would say it puts out an honest 500 lumens at start-up but maintains that level for only a couple of minutes. Then it begins a decline over the next 8 or 10 minutes down to what I would guess to be around 350-375 lumens. It holds that level fairly steady for the next 80 minutes until it drops out of regulation.
Remember how not that long ago it was claimed that 'SF lumens' were always understated and the claims of competitors were misleading?
I'm sure some folks will think they are getting a $265 MSRP light that will put out 500 lumens for more than a couple of minutes from the SF packaging and ad copy.
Thanks for the runtime plot, I do like the regulation with the quick drop off in the end to tell you it is time to change batteries.
No, the EB1 has an XP-E. The E2DLU has an XM-L (if I'm not mistaken). Am guessing that the EB2 will also have the same emitter, optic and circuitry as the E2DLU.
I would hope the E2DL-U would have the newer more efficient XM-L2, other manufacturers have been using it for a while now. However, the recent EB1 still uses an older XP-E emitter as you mention and SF has been known for using 'proven technology' (i.e. less than current LED emitters). As I commented on another thread, a SF P2X Fury I bought the other day seemed to still have an XM-L rather than an XM-L2.
Since the E2DL-U only puts out 500 lumens for a couple of minutes, is it possible that the emitter is an initially overdriven XP-G2? I put one of these in an 'old' SF E1B, with the Fraen optic it puts out more spill than the original XR-E.
I'd like to wait for the EB2 if it's not going to be too long. I like a small light I can carry in a pocket at work and I'm afraid the subdued E2DL-U crennelations (or castellations, one of the former mods would always correct us on this issue) will still tear the fabric. Will the smoother front ring from the EB1 head fit the head of the E2DL-U to give me a kludge preview of the EB2 perhaps?
After losing the use of a couple of Malkoff MDC's (one lost on the road, perhaps at airport security, the other due to a battery put in backwards), I'm back to carrying the SF EB1. I'd gladly trade a small increase in size for more runtime, spill and brightness. Now, about that greenish tint...:)