OK, copied this from a site.
High: H1 500 Lm (3min, then 304lm, total 0.8 hr)
H2 304 Lm (0.9 hr) / 187 Lm (1.8 hrs) / 107 Lm (3.5 hrs)
Medium: M1 45 Lm (8.5 hrs)
M2 19 Lm (16.5 hrs) / 7.5 Lm (42 hrs)
Low: L1 3.0 Lm (4 days)
L2 1.0 Lm (16 days) / 0.28 Lm (50 days) / 0.1 Lm (4 months)
Beacon Strobe Mode: 4Hz Strobe at H1 / 19Hz Strobe at H1