The Shimano dynohubs alone are about 530 grams more than an Ultegra/105/Tiagra front hub. Add a ~140gram E3 Pro, and system weight is up to about 670 grams. The first competing system coming to mind is my S-Mini, which is 100 grams with a LockBlock and an 18650 cell, at ~350 lumens. At 1.5 - 2 hours runtime on full power, it's not the endurance king, but the power-to-weight ratio is excellent, and it's not tied to one bike either.

On the original subject, my E3 Pro asymmetrical is OK in a "showcase" environment (full darkness on an abandoned highway in dry conditions), but it's not what I'd pick for "reading" treacherous mashed-up snow, or spotting black domes of ice frozen onto manhole covers. In those situations, more light is helpful, particularly when trying to overcome the "flat" city lighting in order to cast shadows on ruts and stuff. It's also not what I'd pick for spotting debris on the highway at high speeds... just not enough throw without a boost from a battery-powered system.

If Schmidt comes out with an updated Edelux that's up in the 500+ lumen range, I might be tempted to get the dyno wheel out again. Anyone heard anything?