Learn how to use this product The CELENA™ S LED filter cubes are designed to provide high-power illumination with excellent uniformity. LED is a semiconductor device with an exceptionally long lifetime. The LED light source does not generate excessive heat and allows for instant powering on and off. Enjoy the advantages of high-quality LED filters by customizing your CELENA™ S Digital Imaging System. You can choose from 12 LED filters, all providing high-power illumination and excellent uniformity. Long lifetime (~ 50,000 hours) No warm-up or cool-down time required New optical design ensuring intense and uniform illumination Hard-coated excitation/emission filters for better imaging performance Adjust illumination intensity without ND filters