If light weight is a priority and you don't need a long throw distance, reviews say the 1-ounce Petzl e+LITE is tiny. However, it doesn't get the best battery life (45 hours max) and can only throw light about 60 feet. The light can also clip to a hat or dog collar. The e+LITE has both a strobe mode and red LED for preserving night vision. Many owners like this model for running or walking at night. The pricier Petzl Tactikka Plus (*est. $45) includes a red filter, throws light further and gets much better battery life, but it weighs 2.7 ounces.