Joined: Jan 2009
Posts: 44,193
Likes: 6,428
From: New York, NY, and High Falls, NY, USA
Bikes: 1962 Rudge Sports, 1971 Raleigh Super Course, 1971 Raleigh Pro Track, 1974 Raleigh International, 1975 Viscount Fixie, 1982 McLean, 1996 Lemond (Ti), 2002 Burley Zydeco tandem
You could increase your budget or decrease your lumens requirement or both. My headlight is probably dimmer than most lights discussed here, but it's good enough for me. I can go 15 mph comfortably, and sometimes I can go 20 mph, depending on the terrain. I don't feel the need for being limitless.
Disposable batteries would definitely bum me out.