My [small] collection

Forgot to add that

URA 118218 Super-SATI exit sign
Fun fact: where I live those are called BAES (Bloc Autonome d’Éclairage de Sécurité) which would roughly translate to Stand-Alone Security Lighting Unit (SASL). This unit has a built-in self test function (it triggers randomly, the delay can’t be changed) whereas the unit will light a bit brighter to test the batteries)

There’s a small led that indicates the defaults here they are:

SOLID GREEN: IDLE, normal condition
FLASHING GREEN: IDLE, battery charging up
SOLID ORANGE, GREEN LED OFF: Battery trouble → Replace battery or whole unit
FLASHING GREEN/ORANGE: General failure, replace whole unit

Here’s the unit while IDLE (it looks dimmer in reality)