Lighting

 >Allow natural light to enter, if possible, from all sides of your spaces.  In this manner you achieve greater adequacy and better distribution

 >For better control of natural light prefer blinds rather than curtains on the windows.

 >Prefer light colours on the walls of your house, for they make a the internal environment brighter

 >Ensure that lights in the rooms do not remain switched on when they are no longer needed

 >Prefer a low general lighting and additional lights at the points needed

 >Use low energy consuming lamps.  An ordinary incandescent lamp consumes as much as five times more energy than a fluorescent lamp giving the same amount of light.  The low energy consuming lamps may cost more than the ordinary lamps, but their lifespan is eight times longer and they consume five times less electricity

 >Clean regularly the lighting fittings and the lamps