This triple T8 18 watt ballast has been designed to be as slim as possible. At just 21mm high it is perfect for tight spaces. This ballast unit features optimum cathode control, wide operational ambient temperature range, standard and side mount possibilities and also silent operation.
I gave it less than the maximum because the lamp I ordered with the fitting was defective. After I rang them about it, they sent me another one of a different make. Also, if this fitting is being installed by a DIY person, the information that comes with it says nothing about connecting the fitting to the supply. The terminal block is not marked L and N and it is easy to get the polarity wrong with possible catastrophic results.