Welcome to the site.
LED's are the only way to go for battery operated lights these days. The $1 dollar tree flashlights are so much better than anything you could buy 3 years ago. And you can go brighter from a bike shop, although the headlight I bought from the LBS for $14 wouldn't shut off again. He didn't sell me that used Xtracycle, funny thing. I got a nice bright flashing headlight from niagarcycle.com, who is now out of business.