AquaIllumination (AI) is a well-known brand specializing in high-performance LED lighting systems primarily designed for saltwater reef aquariums, although they offer solutions suitable for freshwater tanks as well.  

They are recognized for:

Advanced Technology: Offering controllable and customizable light spectrums vital for coral health, growth, and coloration.  
Sleek Design: Their fixtures often have a modern and minimalist aesthetic.
Smart Control: Integration with apps (like MyAI) for wireless control, scheduling, and customization via smartphones or tablets.  
Performance: Providing high-intensity and specific spectrums needed by demanding aquarium inhabitants.  
AquaIllumination is considered a premium brand within the aquarium hobby and operates as part of EcoTech Marine.