I bought it new about three years ago, but I only turned it on about a week after I added the fish.
Since then there is no sign of ick in the tank then I shut the UV off since.
So the bulb is like brand new. only used for a week.
Update list. Red Sea Reffer 750 XXL - and sump $1000 pickup
Giesemann Aurora Led + T5 combo perfect condition $1250 firm pickup
Salt mix station include 2 x 55G with lids and plumbing and pan world pump - $100 pickup
Just so that you know. This was the stand he built for me. I asked for it like that plain and sleek. I then stained it and waterproofed it. I cN tell you that Red Sea does not make a better stand than the one I have. I had a Redsea 450 before. He does excellent work.