Lighting the Aquarium: Orphek’s Atlantik V4 LED Luminaire – Photosynthetically Active and Usable Radiation By Dana Riddle Lighting an aquarium would be a simple affair if only aesthetic considerations mattered, however advanced aquarists’ goals often include husbandry of plants, algae, corals and other photosynthetic organisms. To that end, it was originally suggested that only ‘intense’ … Continue reading Lighting the Aquarium Part 8- Orphek’s Atlantik V4 LED Luminaire PAR and PUR