For optimal lighting of aquariums measuring 100 x 40 cm l x w the juwel duolux 60 juwel duolux hood light unit 100 aquarium lamps is waterproof and comes equipped with 2 x 30w bulbs each t8 tube is in day lite colour bringing natural light to your aquarium the built in reflector doubles the light yield of the bulb this allows you to adequately light deeper aquariums and still successfully grow plants the lamp can be opened near the front ideal for feeding fish or checking aquarium