Lightbridge ( LTBG) was shining Tuesday after the Burlington, Mass., transaction processor boosted third-quarter revenue guidance. The company cited strong performances at its Authorize.Net and Telecom Decisioning Services businesses. Lightbridge expects to post a top line of $27 million to $28 million, up from previous guidance of roughly $25 million. The company said earnings would be between 2 cents and 6 cents a share, including a charge, against previous guidance of 1 cent to 6 cents. The company said it will report its third-quarter financial results on Oct. 26. On Tuesday, Lightbridge shares rose 77 cents to $8.30.