Warsaw has opted for high comfort of its residents and large energy savings. In the heart of the capital, around the Palace of Culture and Science and the Parade Square, 250W-400W sodium lamps have been replaced with modern, energy-efficient Astra LED luminaires. At the main arteries of the city there are a total of 103 lamps with high luminous efficiency, with an integrated LED module that emits perfect light while using the minimum amount of energy.