Betty is a 22-watt, 1400-lumen bicycle lamp that you can buy from Gretna Bikes. And it's expensive—at 84 per lumen, the grand total is $1,185. It is, however, the light of all lights for cyclists— just have a look at what it can do below. »10/02/07 6:28am 10/02/07 6:28am
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