I have an Arcadia T5 12% with a reflector behind it. How often should the tube be replaced? I hear conflicting information (some say as often as 4 months, others say the T5s can go out to a year, all sorts of things!)
Yeah generally it's about a year with a T5 but if you have a solarmeter you can measure the output and don't need to replace it until you see the output start to drop. This can vary between bulbs.