Nope never, Ben directed me to the Tropic when I was starting the SPS journey. I heard good thing about them too. I have 2 old school hydra 26 and supplement them with with one tropic and blue +. I have bunch of othe T5 bulbs like coral +, purple, Actinic etc but I prefer to keep the lighting in the 12K-14 K range. I am thinking of adding two of those OR UV bar over the tank but debating on which lens I should go with.Amen to that! Have you ever used the GE 6500? If so, how does it compare to your Tropic?