These are a further improvement on the standard SOX lamps they offer longer life and much higher light output per watt.

The 18 watt is not available.

The SOX E will run on the same control gear as standard SOX. it will give the same light output for a much reduced wattage i.e an energy saving.

But to achieve the full savings of up to 40% you need the dedicated high frequency control gear.

26 w=35w,36w=55w, 66w=90w, 91w=135w, 131=180w.