The Zenergy Lightsaver is the key energy-saving device marketed by The Green Man.

Filling the gap between proven, legacy technology and the promise and price of technologies such as LEDs, the Zenergy is a low-cost, one-off retrofit which reduces the energy consumption of magnetically ballasted lamps by around 30%.

Fitted alongside a distribution board or lighting panel, the Zenergy's autotransformers reduce the incoming mains voltage by a preset percentage, and smooth the waveform.

Suitable for neons, mercury and sodium lamps, the Zenergy is ideal for legacy, and most recent, indoor and outdoor installations which are on for protracted periods. It can also be commercially viable for high intensity, short on-time sites such as sports stadia.

For a one-off cost in the thousands, half a man-day of labour, and near zero maintenance, the Zenergy saves a typical 30% of your lighting electricity bill for years, from the moment it is switched on, with no further costs.