LIF Light Guide reduces not only the artificial lighting, but also heat losses in winter and cooling loads in summer.

The uniform level of the illuminance created by LIF is the optimal basis for an automatic lighting control. This allows to keep a constant level of illuminance throughout the room, independent of the varying daylight.

The combination of LIF and the automatic lighting control saves energy and expenses. Despite the deviations due to the diurnal and annual apparent movement of the sun the daylight is sufficient to save up to 60% of lighting energy over the year.

LIF saves valuable energy in addition:
LIF reduces the thermal transmittance (U-value) and the total energy transmittance (g-value) of double glazing by about 30% and helps for more pleasant room temperatures.

The lower U-value means not only lower heat losses and therefore lower heating bill in winter, but also thermal comfort of workplaces near to the window.

The lower g-value helps to prevent the overheating of the buildings in summer, reduces the cooling loads and therefore the energy cost.