User interface and app control are big for me. Aqua illumination I have always used and know but I recently bought a reefi uno that seems to be quite durable and powerful. So to answer your question a durable,powerful and easy to use interface is the standard in which all lights should strive for.DAILY QUESTION: What are factors that you consider important when choosing a reef light? Why did you choose the light that you are currently using on your reef tank?