The LED MultiLux lighting unit is a high-performance, energy-efficient LED lighting unit for your JUWEL aquarium. The old T5 lighting units can be completely replaced with the new LED MultiLux lighting units. The replaceable LED tubes of the DAY and NATURE types create an ideal light spectrum for plants and fish, while providing up to 50% energy savings compared to T5 lighting units. T5 lamps will not work in these new units, and LED lamps will not work in the old T5 units. Both LED lamps must be inserted into the unit for the system to work; it will not operate with just one tube. The 12-watt LED MultiLux unit, 60 cm in length, fits the Lido 120.