I ended up just doing cuts on the light to fit it into the spot where the past light was to keep the lid. I will post on build thread how I did it later.The only thing I wish that Fluval would have done was make the lights mounting arm a bit taller to get the light up higher a bit. The light has the power to achieve PAR levels but when maxing out the mounting height on the light do the bracket it forces the light to have a smaller spread imprint. I run without the lid just for the sake of optimal gas exchange / evaporation.