led optical lens, different size working with different leds

EVO 3W Ultra Marine LED fixture provides a high quality, energy efficient light fixture that shimmers though that water. Use the 10000K white LED during the day and the Actinic Blue 460nm LED during the night. The EVO LED is a sleek and contemporary light fixture that will make any other aquarium light look boring. Long lasting LEDs with no bulb replacement required. Extendable brackets - 18"-22" (45cm - 55cm). Super energy efficient marine and freshwater aquarium lighting. No bulb replacement required.