UV T5 Lifetime

Hi all,

I would like to test some UVA T5 but i have not find the lifetime of Agromax tube. I see 1y warranty but not other specifications. Could someone tell me the frequency of replacement?

With the Philipps Cleo for exemple, its 400hours or 800hours so they must be replaced at each new session : efficiency decreases rapidly.

Thank you
Kiss

I have the answer :

"
We recommend changing the lamps after every 18 months of use. The longer lamps are used, the less light they put out. After 18 months they will probably be emitting only 50% of their initial peak output. Lamps however can work for years though. "

Well im very sceptical "After 18 months (12960hours) they will probably be emitting only 50%", not very accurate, no datasheet, no operating hours informations....

How its possible majority of UV tubes's operating hours is about 700/800 hours (67 Bloom day) and these are 1000+ with 50% efficiency.

It smells total Joke.