Upgrading Tank.

[Fish are friends]

Hi everyone..
I am going to start upgrading my 90l tank and want to change the lighting.. i currently have an 18w T8 bulb in there and was wondering what would the max wattage i can put into the existing fittings...I was going to go down the road of T5 but that would mean a whole new light fitting etc.

 

[Malawi MaD]

You can buy T5 lighting pendants, at least then you dont have to mess around fitting a whole new lighting unit.