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Serfas
Thunderbolt
Thunderbolt
Serfas
Bike
Claimed Specs
Beam
Flood
Lumens
35 High
Med
Low
Run Time (mins)
90 High
Med
Low
Charge Time
4 hours
Weight
50 grams
Claimed
vs
Actual Results
Lumens
Beam Angle
Runtime
Claimed
35
90 mins
Actual
32
88°
77 mins
Difference
-3
-13
mins
Lumen Test
Beam Test
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