On the mind of many people, the best lights for is with high Lumens. So they would like to search some high brightness lights, such as the light with output above 2000Lumen (like MJ-880) or higher (like 2200lm Spiker 1207)...but is it really a right guide? What do you think about this question, on the basis of your professional experience-is it true that high lumen lights are best for MTB?