Gear Hub fan
Join Date: Nov 2008
Location: Reno, NV
Bikes: Civia Hyland Rohloff, Swobo Dixon, Colnago, Univega
Based on listed run times it will be about 288 Lumens on High and 120 on Low. Maybe slightly better than that IF the claimed maximum Lumens output is any where near the truth.
Many LED light makers seem to grossly exaggerate their output light levels however. They base their Lumens output listed on LED manufacturers maximum output ratings but do not drive the LEDs at the full current required for full light output and do not account for losses due to actual LED junction temperatures in their devices or for losses caused by reflection from lens surfaces.
Gear Hubs Owned: Rohloff disc brake, SRAM iM9 disc brake, SRAM P5 freewheel, Sachs Torpedo 3 speed freewheel, NuVinci CVT, Shimano Alfine SG S-501, Sturmey Archer S5-2 Alloy. Other: 83 Colnago Super Record, Univega Via De Oro
Visit and join the Yahoo Geared Hub Bikes group for support and links.