Stila Energy S.p.A. has installed several hundred voltage regulators in retail areas (supermarkets, hypermarkets, shopping centres, etc.) beginning with some top Italian and European chains. A good deal of these installations have been monitored for years, with the goal of verifying the savings obtained and the behaviour of the lamps handled, with an excellent client satisfaction.

In this sector the interests of the client, besides verifying the actual savings achieved, is to preserve lighting levels that guarantee total satisfaction and maintain company standards.

These verifications and the data obtained show average savings on energy consumption of around 35%, with peaks of over 40%. These percentages of energy savings are a reflection of savings on the lighting plant only. When taken together with all other general energy consumption at a retail sales point the savings amount to values between 12-14%.

The energy savings is also generally accompanied by an improvement in the cosf value with a net decrease of the absorbed reactive energy and greater efficiency of the electric lines.

The drop in brilliancy, which due to the law of physics is a side effect of voltage reduction, in these real applications, although not visible to the naked eye, was registered at values between 10 to 20% using a luxmetre.