The Lumi Lite Pro Ultra Actinic LED Light is designed and manufactured in the U.S. It features a new Violet channel and Reef Brite's signature Blue channel. The Ultra Actinic promotes photosynthesis and fluorescence, enhancing the color of corals, invertebrates, and fish. Users can adjust the spectrum, including the color, between the popular standard Blue channel and a newly added Violet channel independently with the included inline dimmers. This powerful LED light features LED arrays for maximum performance. Users can combine multiple units for even more PAR and output. The Lumi Lite Pro 50/50 LED Light is designed and manufactured in the U.S. It features a new Violet channel and Reef Brite's signature Blue channel. The 50/50 is ideal for aquarist who want to bring out colors in their corals and fish. Great for freshwater, marine and reef tanks, the 50/50 duo enables users to adjust the white and blue channels independently with the included inline dimmers.Related Articles:Reef Aquarium Hood Lighting Chart I What are Wattage, Lumens, Lux and PAR? Article I Getting the Most out of Your Light I Are There Reasons To Buy Anything Other Than An LED Light For Your Aquarium?.