With the Advanced Series Elive LED Track Lights you can customize the output pattern and direction of light coverage to best fit your unique freshwater; planted or saltwater reef aquarium! The Advanced Series now features twin two-rack light rails; allowing you to fully customize the location of each LED POD for 120 degree light dispersion and optimal lighting coverage. The fixture also includes fixed Cool White LEDs; giving you more LED brightness than ever! Elive's patented two channel design includes a shimmering mix of Cool White and Blue LEDs; great for bringing out the sharp colors of your fish and providing the light needed for the growth and color of saltwater live rock and coral. Elive's energy efficient LEDs have lifespans that exceed 20;000 hours! Additional LED PODs are available; allowing you to add lighting power and customize color output to fit your aquarium. Simple design makes changing; adding and adjusting LEDs quick and easy. Advanced Track Light includes 18 Fixed White LEDS; 12 White and 2 Blue LED PODS with an output of 1320 lumens. The 24 in. model can hold up to 26 LED PODs total; for a maximum output of 2600 lumens. LED Channel Dimmer allows you to adjust the color temperature of the Blue LEDs for a customizable color pattern. Included mounting legs adjust to fit aquariums 24 in. to 36 in. long. For more information on LED lighting; please read our article on LED Aquarium Lighting Basics.