Ground Breaking 100 watt Eqvt 120 vac Light Bulb

For mountain biking, 3 or 4 years ago, all of us went from HID 10 watt bulbs with ballasts to LED's, and the price keeps on dropping lower and lower, for more lumens. 700 lumens used to be a good number, for about $90 from China, it's less than half that for 1500 lumens nowadays.