I'm getting a 1000 lumen Dinotte XML-3, my primary motivation being runtime not maximum brightness. Most lights seem to have similar rated running times at the maximum setting, but cold weather dramatically reduces battery life. Many times in the winter I can't even finish my ride on the middle setting of my Stella 200 before it falls back to the lowest setting.

Even on the 200 lumen max setting, there are times where I feel I could use even more light, particularly on wet roads or new asphalt.

Riding the MUP at night during the summer I could really use a helmet light in addition to one on the bars. There are many sharp turns that you essentially enter blind because the handlebar is pointed in the wrong direction.