I have an older Niterider Omega 300, that they have now raised the lumens to 330. This is a very good light, the battery in mine is now 6 years old and still holds a charge just fine. The brightness of it makes it show up extremely well in broad daylight from over a mile away. The newer version will run at max output on flash for 6 hours, at night on high steady it will run for up to 7 hours. I have found that Niterider estimates on run time are about 15 to 20 minutes on the low side, so 6 hours would actually be 6.25 hours.

The EMax would be cool if it was 330 Lumens like the Omega & had a flat backside for mounting. 💩