I'm light shopping to replace my Exposure Diablo, which is a nice small size 1200 lumen light. It's always bothered me though that it is only good for about 2.5-3 hours using a combination of low/medium power, and if I use high it will give me about 1 hour at the most.

so, I'm looking now at the Exposure Six Pack Mk5, rated at 3200 lumens. It works 36 hours on low, which is comparable to low of my current light. This would cover any ride I'll ever do, and having the 3200 lumens available for a minimum of 2 hours sounds like a huge plus, but brings the question:

Is 3200 lumens so many that it's not even usable? I think the standard car headlight is ~1000

the light in question: Six Pack MK5 | Ultimate Sports Engineering