Answer:
the Luxor Sky Beam
Step-by-step explanation:
At 42.3 billion candela, the Luxor Sky Beam is the strongest beam of light in the world, using curved mirrors to collect the light from 39 xenon lamps and focus them into one intense, narrow beam. On a clear night, it is visible up to 275 miles (443 km) away by aircraft at cruising altitude, such as over Los Angeles.