Kessil H80 Tuna FloraDesigned For Refugiums! The Kessil H80 Refugium Lights are perfect for growing many different types of algae, most notably chaetomorpha. You can tune the light manually or it is fully controllable through its four different color modes with the Kessil Spectral Controller or any 0 10v controller. Integrated heat sink Dimmable Kessil Logic Color Tuneable Canopy Mount included Compatible with Spectral Controller Connect multiple with unit link cables