For Electric Customers
Replacement options for an incandescent exit sign include fluorescent and LED lamps. For most applications, it is more economical to install a retrofit kit in place of an existing incandescent lamp, rather than replace signs with a new model. In deciding to replace an old exit sign or use a retrofit kit, compare the life cycle cost, not just the initial cost. Other factors to consider include the age of the existing fixture, as well as installation, maintenance, and electric costs. Remember that not all retrofit kits will fit all exit signs.
See Electroluminescent Exit Lighting