Gang@ukaps Could somebody / bodies please explain the difference between T5 and T8 lighting and the benefits / loses between the two different types of lighting. Wondering weather to change my hood. Current lighting:2 x Flora glow 30 watt 36â€ in length & 1 x Aqua glow 25 watt 30â€ in length. Total wattage 85watt on a 217 litre aquarium (Aqua one AR980). Regards Paul.