so i'm in florida on a family matter and i hit the local hardware store...not one of those giant chains...a real old timey hardware store full of crazy crap. and as i stand there waiting to check out i see this: its billed as a light for clipping on to your glasses, which i admit is the dorkiest thing in this world. but for $2.99 who can resist? and i discovered they latch on nicely to hat brims. check it out.
the brand is panther vision. i got it from a "do it best" type of hardware store