If you’re looking for emergency exit lights with
battery backup, consider WareLight LED Exit Sign/Emergency Light
with Battery Backup. Easily convertible from double to single face, this unit
offers highly efficient LED output and an LED lamp that can last 25 years. It
features easily seen 6-inch red letters on a white background. A sealed,
maintenance-free, lead-calcium battery and easy-to-remove-and-replace chevrons
enhance its reputation for worry-free use.