Ive been doing a lot of caving and hiking over the past year,i bought a 100 Lumen Energizer hardcase Pro headlamp http://www.energizerlightingproducts.co ... D31PH.aspx
It is waterproof,mudproof,rainproof,has taken some serious smashes in caves,has endured a 3 year olds tantrums,and its over a year old and not a single problem.Decent AA batteries will last 4hours on high,even cheapy batteries will last 2 hours.High and low settings,as well as red and green LEDs for night vision,and a light diffuser for spot light/area light(diffuser GREAT for caves and covers a massive area up to 50 ft,spot for up to 250ft!).The durability,toughness,and decent battery life made this the choice above and beyond many more expensive models.And for $30-im not going to argue!Can be found @ Walmart and most hardware stores.You will NOT be dissapointed.Just watch out,there are 70 and 100 lumen models,in the same 2 kinds of packaging(arrrg)so watch out!And the price some places will go $50,but the price IS $30.
PS I went thru a fleet of headlamps before this one.A fleet in less than 1 year.this one is over a year old now :)