Street lamps light up urban parks and streets. There are of different types, varying by technical qualities, materials and modes of installation. Among the most modern models there are LED street lamps and solar energy street lamps which allow for lower management and energy costs. Lamps can differ also by the type of lighting that, as it is for the homes use can be direct or indirect, depending on the type of space where they are installed. As far the materials are concerned, street lamps are almost always made in metal and especially steel or aluminum.