Marineland Reef Capable LED Lighting System (18-24") has a fully integrated timer that automates LED lighting for consistent photoperiods. Marineland Reef Capable LED Lighting System w/Timer boosts functionality by employing an easy-to-program digital timer. You control when the 460nm blue and 10,000K white LEDs turn on and off with a simple push of a button. LED light fixture comes preprogrammed to simplify use or custom program for reliable, scheduled LED reef lighting! Marineland Reef Capable LED Lighting System w/Timer ushers in a new era of functional and affordable LED lighting. Optimized for use in reef aquariums featuring 1 watt 10,000K LEDs and powerful 460nm actinic blue LEDs that provide the correct spectral output for coral growth. Polycarbonate focusing lenses and specially-facetted dispersion lenses maximize light penetration while ensuring an appealing light spread. Experience dazzling light effects PLUS, intense penetrating light that support the needs of reef aquarium corals. Marineland Reef Capable LED Lighting System w/Timer boasts a signature low-profile design that measures just 1/2" thick. Cool-running and energy-efficient LEDs significantly reduce utility bills and eliminate costly replacement bulbs that dig into your budget. Adjustable mounting legs accommodate a variety of aquarium sizes. 50,000 lifetime hours. Use multiple light fixtures based on your reef illumination needs Brilliant reef capable LED fixture with built-in timer operation Provides correct intensity and spectral output for reef aquariums Simple push-button operation automates 24-hour LED reef lighting Model # of White 10,000K LED's # of Blue 460nm LED's Lumens Lamp Only Length Lamp & Legs Length 48-60" 46 8 3,340 46.75" 48.5"