Why it gets so dark in the tropics?

In the tropics, darkness can occur quickly due to the region's relatively consistent day length throughout the year, with sunrise and sunset times remaining fairly constant. The sun's position is generally high in the sky, leading to rapid transitions from daylight to darkness as it sets. Additionally, tropical areas often have dense vegetation or cloud cover, which can enhance the perception of darkness. The combination of these factors contributes to the swift onset of night in tropical regions.