"Toni" wrote in message
ink.net...

"Marcus Fox" wrote in
message ...
How many hours is a T5 tube good for before it needs to be replaced?



The reports I've read indicate a 20,000 life running at greater than 90%
of
initial output.
Mine are just under one week old- I'll let you know g

If on for 12 hours per day at 7 days a week and 4 weeks per month, that's
about 5 years lifetime, lol. Just my 15w freshwater lamp seems a lot
brighter than my 15w tropical lamp, which is 6 months older.

Marcus