My lamp is rated for 14 months... boasting the longest lamp life on the market...
Although it is still "on", it doesnt do the job it used to.
that same lamp has been running for about 13 months now. Im waiting to see if its going to burn out like every other UV bulb eventually does or not. Any other bulb ive had lasted 6-8 months.
This is not a necessity for Arowana or Rays, but does make the water extremely clear. The only benefit i use one for, is for that purpose.
Which reminds me... i need a new bulb... feels like i just bought the thing! lol