Tritium illuminated signs are lit by a cold source of energy. They have no wiring, battery or switches but have a useful life of up to 25 years and require no maintenance for that period. They are intrinsically safe in hazardous conditions. They have been in use for many years offshore and underwater As well as in schools, cinemas, apartment blocks and with the Armed forces and many rigorous conditions. At the end of their specified useful life they should be replaced or removed.
PWG are agents for the manufacturers and as such can provide you with prices for ; New Signage , Replacement signage and a means of disposal of spent modules.
After the initial outlay they will pay for themselves many times over compared with alternative Illuminated safety signage costs maintained over 25 years. Contact PWG for further details