Cateyes are really good.
Here's a
$20 one (before shipping, though the 10% off coupon code w229 will knock off a couple bucks).
Or, if you can afford $15 more, the
tl-ld1000 is really great and nearly impossible to miss on the road.
__________________
.
Reason is a scoundrel, stupidity is direct and honest. –Ivan Fyodorovich Karamazov
Man's mind, once stretched by a new idea, never regains its original dimensions. –Oliver Wendell Holmes