Often, the low bid fails, and a reputable sign company picks up the contract and performs a miracle on overtime. Typically, this involves a 15,000-sign project that requires three to four weeks to prepare the estimate. A bonded local sign company once bid a half-million dollars because that was the limit of its license. Don't forget that cabling the wiring for signs involves payments of hundreds of thousands of dollars. A large, experienced sign company can anticipate such a calamity and choose not to bid.
Companies bid on installation of the systems.
Both the sign and general contractors may bid in competition, and the sign contractor may lose the supplier contract and still win the installation. Should the sign contractor not bid on the package, they usually contacts the announced winner of the bid to offer installation services. Super Vision - Fiber optic components and kits for the sign industry.