The Arcadia T5 Marine White Lamp has a colour temperature of 14K (Kelvin) and an exceptional lumen output combined with very good colour rendition. The tri-phosphor formulation provides consistent long life and stability of output at these high levels of performance. These factors make it the ideal choice for the serious marine aquarist, with excellent levels of light throughout the aquarium and extraordinary clarity for viewing the constantly changing marine environment. A high proportion of light energy is concentrated in the area between 400 and 480nm, which also assists in the promotion of zooxanthellae production to encourage coral and invertebrate growth. The other peaks across the spectrum allow the true, vibrant and natural colours of the fish, corals and invertebrates to be enhanced and to really stand out.