As rents continue to push northward tenants are search for value options.  In this particular case value is located in Charlestown for Light Blub, which lured the company away from Cambridge.

Credit: bizjournals.com

From the BBJ:

Light Bulb had been located in 2,000 square feet at the Cambridge Innovation Center, a coworking space for startups, before looking to branch out. The company was considering other office space in Cambridge or Boston. But it was a recently renovated brick-and-beam office building at 56 Roland St. in Charlestown that caught Finally Light Bulb’s eye…The company will expand to 8,000 square feet in March at the office, quadrupling its existing space.