I have a Niterider MiNewt 600 cordless. I seldom use the 600 lumen setting. Most often I use the 400 lumen setting as I can see well enough and the battery lasts much longer. I have rather poor eyesight.

I also have a Niterider MiNewt 150 mounted to my helmet for most night rides. I use it on the 100 setting. You might want to consider putting your Kong on your helmet. It's nice to have two lights in case one dies and a helmet light is nice when you want to see things that aren't straight ahead.