You people that discount LED's have only used Wal-Mart quality LEDs, my bike light is bright enough to make cars flash their high beams at me on the road and bright enough on the trail to see 100 yards ahead. It runs off 4 AA size lithium-ion batteries, and the light head is small enough that I can almost close my hand around it. The LEDs in this one cost maybe $60 alone, but they will last 50,000 hours, I will upgrade them to something more efficient before they burn out(or break). Maglites are cheaper and easier to use, and also serve as a baseball bat.