Played with these over the summer and they completely rule for glowie rounds. Wafer thin and attachable with clear duct tape. Won't come off like the bobbers. love em.
http://www.extremeglow.com/Merchant4/merchant.mvc?Screen=PROD&Product_Code=WIP&Category_Code=BL
http://www.extremeglow.com/Merchant4/merchant.mvc?Screen=PROD&Product_Code=WIP&Category_Code=BL