I have (2) 65W daytinics
(2) 65W 7100K
These bulbs were bought from hello lights from their clearance section. They would not fit my fixture because they were about a half inch longer than the bulbs that the fixture came with. I paid $5.00 each for them. I have never fired them. They could possibly work in a different brand fixture or if you were running a PC retro set up. They are square pin style. asking $5.00 each or possible trade for something reef related. Just ask and I might be interested.