Does anyone have personal experience riding with one of these puppies at speed? The specs on this LED are impressive to say the least. 900 lumen is the maximum rating though and I kinda doubt they are driving it that close to the limit. It's powered by lithium ion batteries. This thing should seems like a good deal also...the complete package is $77. EDIT: http://www.dealextreme.com/details.dx/sku.25149 Read some reviews this thing is the ticket if you don't want a mini-SLA setup.