LEDDY TUBE RETROFIT are replaceable universal LED modules that can be installed in place of the T5 or T8 fluorescent lamps (adapters included). They consume half as much energy as regular fluorescent lamps to emit the same amount of light. It is also worth noting that LED modules do not heat the water in the tank. Since they emit directional light, no reflectors will be necessary. The modules employ light-emitting diodes with a long service life.