JBL Solar Ultra Marin Day produces a coldwhite spectrum with a colour temperature of 15000 K and higher luminosity specially designed for lighting marine aquariums. Provides corals and other invertebrates (lower animals) with rthe required light energy for ideal growth. The specially increased fraction of the spectrum from 400-500 nm provides ideal conditions for zooxanthella, essential for the growth of many corals and other invertebrates.-16 mm thin diamater-20000 hours lifetime-150% lighting strength, with only 30% more electricity consumption-Please note: these lamps are available in different lenght (also suitable for the Juwel High-Lite lamps), please take care for the right one for your lighting.Available sizes:24 W - 438 mm24 W - 550 mm28 W - 590 mm35 W - 742 mm39 W - 850 mm45 W - 895 mm54 W - 1047 mm54 W - 1150 mm54 W - 1200 mm80 W - 1450 mm