If you want low output on an E2e, or an E1e for that matter, you need look no further than a KL1. It puts out about the same output as the mn01. If you don't like the color, swapping the LED for another is quite easy. This will give you a good 4 hour runtime on two batts. When you get tired of bumping into things that you didn't see for lack of light, you can have it overdriven.