Maybe I aggregated it correctly here:
SK05 spec (old) result E28 spec result
flood high @600lm 3:30 (6:00) -> 850lm 2:35..3:00 @1000lm 5:20 -> 800lm 3:40
-> @500lm 8:20 -> 450lm 7:35
flood med @220lm 11:00 (20:00) -> 330lm 9:12 @200lm 18:00 -> ?
spot high @630lm 5:30 -> 600lm 2:35..3:15 @900lm 7:15 -> 870lm 3:35
spot med @230lm 11:30 (19:00) -> 270lm 13:20 @300lm 13:15 -> 300lm 11:50
-> @100lm 37:00 -> ?
Looks better for E28 especially in high modes, and with smaller battery. Saw Zero’s Pro 2 review and it set runtime of flood 1000lm for 2:15, spot 700lm for 2:35 - no change in efficiency. That is less useful than E28’s 3:40 @800lm and 3:35 @870lm. Imagine you can produce strong light not far from 1klm for almost 4hours. 1Lumen review I just read has better outcome interestingly, high modes are brighter, and medium modes are indeed nicely consistent. I guess we need third review.
Still I chose E28 MAO for versatility, stronger magnet, moonlight 10lm vs vulgar 50lm, over SK05 v2 MAO UV (even UV special offer did not convince me), tho side light was very tempting as having at least one High CRI emitter is useful. Overall they are both great choices and very similar. Loopgear has more public traction, so they might come up with v3 which I will likely buy.
Cell Brand Type Voltage Capacity Resistance Discharge Size Flat TEST: Capacity Resistance Weight Notes
model name size V mAh mohm A mm X/S/- mAh mohm g details
18650 Loopgear 18650 3.6 4000 18.5x69 P D3612,C3638 27 50.1 from Loopgear SK05 Pro, measured 14.059Wh vs 14.4Wh
--""-- 18.5x69 P D3626,C3611 27 50.1 from Loopgear SK05 Pro, measured 14.064Wh vs 14.4Wh
HL35 Jetbeam 18650 3.6 3500 -10 18.5x70 P D3229,C3251 29 49.8 from Jetbeam E28 White, measured 12.716Wh vs 12.6Wh
--""-- 18.5x70 P D3299,C3322 29 49.8 from Jetbeam E28 White, measured 12.809Wh vs 12.6Wh