You may check the tube life span. Normally is on the packing box. For PL9W if you are buying from outside lighting shop normal is only <3,500 hours and is very cheap type. It is justify for what you pay for the quality of goods.
Anyway just change one to solve your problem.
Mason
[quote:45f5bbb48c="moss_fanatic"]Hi,
does anyone knows why my lights suddenly turned dim? I have a feeling that something is spoilt but dunno where it is spoilt. I on it around 12 hrs a day for my 1ft moss tank. If it is spoilt is it advisable to repair or get a new one in terms of costs?[/quote:45f5bbb48c]
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