JUWEL MultiLux LED UnitThe MultiLux LED is a high performance, energy saving LED light unit for your JUWEL aquarium. The Old T5 lights units can be completely replaced with the new MultiLux LED light units. The replaceable LED tubes create an optimum light spectrum for plants and fish, while saving up to 50 % of energy in comparison to T5 light units. Old T5 bulbs will not work in the new light units. Both LED bulbs must be inserted into the unit for the system to work, It