Bear in mind that most lights will only run about 1.5 hrs on their highest settings - hence the recommendations to buy a light that is brighter than necessary, so that you can run it on a lower setting and still get 2+ hours of runtime. That's why I recommended the Bontrager light with 1300 lumens, since you are looking for that brand. And if you have one of those integrated mounts - which are very slick and cool - I think that's a good idea.
You can buy a 700 lumen light, but there is a tradeoff in the brightness vs runtime equation.