With Elive LED Track Lights you can customize the output pattern and direction of light coverage for your aquarium. The fixture features a two-track lighting system that allows you to slide each LED POD back and forth to set up the coverage that you desire; giving you 120ï ½ of light dispersion Blue LEDs are adjustable with channel dimmer to control overall color temperature of the fixture. The lighting system comes with three 1w LED PODs (2 10k white; 1 445nm blue). Additional Light PODs are sold separately; allowing you to customize total light output. The 20 in. model can hold up to 12 PODs total. Fixture comes with 160 lumen output; and can emit a maximum of 960 lumens with 12 PODs. Legs adjust from 20 in. to 26.5 in. wide. For complete product information; download the instruction manual. For more information on LED lighting; please read our article on LED Aquarium Lighting Basics.