It's no secret that The Grand Canyon State has spectacular sunsets. But, what if we were to tell you that a completely different phenomenon in the sky just occurred? Last week, Arizona's purple sky took residents by storm and you won't believe what actually happened.\nOn January 11, early in the morning, the sky glowed purple instead of its usual blue in Snowflake, Arizona.\nThe culprit? A nearby medical marijuana farm called Copperstate. Its UV lights were the cause.\nAccording to Navajo County's Facebook page, "🔎The purple glow is a result of UV lights from nearby medical marijuana farm Copperstate Farms and the snow clouds overhead."\nReportedly, the sky was this unique color for miles around.\nThat same morning it has snowed, which is why "Water droplets in the low-lying fog reflected the light, which made it spread across the sky."\nCopperstate Farms is the largest greenhouse in North America that grows medicinal marijuana. They use red and blue lights to help produce the plant.\nSince the farm consists of 40 acres, there's no telling if the sky will change colors again.\nView this post on Instagram Our Snowflake sanctuary.⠀ ⠀ #sungrownwellness #copperstate #snowflake #az A post shared by Copperstate Farms (@copperstate_farms) on Oct 8, 2019 at 12:01pm PDT\nNavajo County's post has received over 1,500 shares and 275 comments. Some of the commenters were quick to express how amazing the sight was.\nOne person wrote, "Beautiful 💜 But I also want to know what caused this?"\nWhile another person said, "The lights are LED lights. The purple glow is a combination of red and blue LEDs. Most plants respond best to these two light spectrums. Pretty isn't it!? I see it every morning driving into work there."\nView this post on Instagram The farm at night is unlike anything #sungrownwellness #snowflakeaz A post shared by Copperstate Farms (@copperstate_farms) on Jan 4, 2019 at 1:11pm PST\nOthers found it funny that weed was the culprit of the interesting-colored sky, "The pot farm caused the glow 😂😂😂."\nIt was a trippy Friday morning, that's for sure.\n❄ The snow wasn't the only gift the skies had in store for us this morning. \n💜This photo taken from Snowflake, AZ early...Posted by Navajo County on Friday, January 10, 2020\nNarcity has reached out to Navajo County for a statement and will update this article with any new information.