not with a 50 lumens LED replacement they're not =)
I'm currently working on 'project Sturmey Archer' - turning an old SA front light with a built in switch into a battery powered (via internal battery pack) LED superlight (using one of these - a screw in LED replacement)
They're pretty shit if you want something to see ahead of you, it'll be just about enough to let other know of your presence but that it.
not with a 50 lumens LED replacement they're not =)
I'm currently working on 'project Sturmey Archer' - turning an old SA front light with a built in switch into a battery powered (via internal battery pack) LED superlight (using one of these - a screw in LED replacement)