For Christmas, I bought my husband and son baseball caps that have LED lights built into the visor from QVC. They us them when they walk the dog at night. They both like them better than the miner's light and they look good, too.
I never thought to try them for hand sewing. I am hand quilting a Sunshine and Shadow quilt with the Shadow being black and using black thread. Really hard to see. I'm going to "borrow" one of the caps to see how they work.