* For freshwater or marine aquariums.* Features ULTRA SEAL� waterproof (to IP67 standard) lamp holders.* Lamp changing simplified.* Lamp holders come complete with universal mounting brackets for fitting to aquarium walls or lid. Building on the extremely popular fluorescent controller series, Arcadia have developed the ULTRA SEAL� waterproof (IP67) lamp holder to ensure that this product complies with the forthcoming lighting safety standard, which comes into effect in June 2008.