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Cleveland's night owls and early risers began to notice a bright purple glow in the sky over the city of Ohio about a month ago, especially in cloudy weather.
But what was the cause of unexplainable magenta light?
That's what nearby highway drivers and other locals have asked themselves: some have turned to Reddit for answers and others have asked local TV stations to solve the mystery.
The theories of amateur detectives, shared on social media and in the news, went from the obvious to the extraterrestrial: they were extraterrestrials? Northern lights? The glow of a digital signage board? A new nightclub near Diamond Avenue and East 55th Street, where the lights had been spotted?
The real explanation was scary.
Several months ago, Green City Growers – a city greenhouse – opted for a purple LED light, which lights up every morning around 4 am, Cleveland News 5 announced. the big greenhouse has always baffled neighbors and commuters on highways 490 and 77 since.
"These LED lamps help plants to grow faster and healthier," said General Manager Jeremy Lisy, according to News 5. "For example, with traditional lighting, it would take about 30 to 35 days to harvest basil. reduced to about 28 days. "
Lisy told the TV channel that he was waiting for people to start asking questions about the purple glow.
Plants performing photosynthesis can absorb red and blue light in the most efficient way. Therefore, pink and purple LED lights are a good way to meet their light needs without using too much energy, reports NPR.
The purple lights are back in the local news this week, after people outside the Quicken Loans Arena and elsewhere have started sharing photos of a very magenta sky, some wondering if it was a UFO, according to FOX 8.
Others already knew that the greenhouse was the culprit.
Green City Growers is a year-round, pesticide-free co-op in its 3.25-acre hydroponic facility in Cleveland, making it the largest food-producing greenhouse in the central urban area of all US cities, according to the report. website of the cooperative. It opened in 2012.
The greenhouse produces one million lettuce heads each year, as well as other products ranging from micro-vegetables to herbs. These products are delivered to local restaurants, grocery stores and elsewhere in the Cleveland area.
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