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This Harry Potter candle reveals your Hogwarts house
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Muggle Library Candles in Fort Worth, Texas, recently revealed a new candle that, once burned, reveals which Harry Potter hose you belong to. - photo by Herb Scribner
If youre still unsure about which Hogwarts house you belong to, a candle might help you.

KGW.com reported that Muggle Library Candles in Fort Worth, Texas, recently revealed a new candle that, once burned, reveals which Harry Potter house you belong to.

The candles wax burns white at first, but will then shift to either red, yellow, blue or green to reveal which house youre supposed to join, according to Refinery29.

When you buy the candle, there's no way of knowing what colour, or house, you'll be sorted into you just have to light it and wait, Refinery29 reported.

The candle smells a little like lemon, sandalwood, vanilla and patchouli.

This candle was amazing! It had such a fresh and clean scent. The packaging was beautiful and it was packaged so safely! The owner even included a handwritten note and a sample of another candle scent in the package! I will definitely be ordering again, one reviewer wrote on Etsy.

The candle is available from Etsy and costs $14.

The popularity of the candles has pushed pre-orders back until February.

As POPSUGAR revealed, buyers cant pick their house ahead of time.

While Harry wanted anything but Slytherin, we'd be happy with any one of the four Hogwarts houses, so long as the message is conveyed through a comforting aroma and warm flame, POPSUGAR wrote.
Its toxic: New study says blue light from tech devices can speed up blindness
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A new study from the University of Toledo found that blue light from digital devices can transform molecules in your eyes retina into cell killers. - photo by Herb Scribner
It turns out checking Twitter or Facebook before bed is bad for your health.

A new study from the University of Toledo found that blue light from digital devices can transform molecules in your eyes retina into cell killers.

That process can lead to age-related macular degeneration, which is a leading cause of blindness in the United States, according to the researchs extract.

Blue light is a common issue for many modern Americans. Blue light is emitted from screens, most notably at night, causing sleep loss, eye strain and a number of other issues.

Dr. Ajith Karunarathne, assistant professor in the UT Department of Chemistry and Biochemistry, said our constant exposure to blue light cant be blocked by the lens or cornea.

"It's no secret that blue light harms our vision by damaging the eye's retina. Our experiments explain how this happens, and we hope this leads to therapies that slow macular degeneration, such as a new kind of eye drop, he said.

Macular degeneration is an incurable eye disease that often affects those in their 50s or 60s. It occurs after the death of photoreceptor cells in the retina. Those cells need retinal to sense light and help signal the brain.

The research team found blue light exposure created poisonous chemical molecules that killed photoreceptor cells

"It's toxic. If you shine blue light on retinal, the retinal kills photoreceptor cells as the signaling molecule on the membrane dissolves," said Kasun Ratnayake, a Ph.D. student researcher working in Karunarathne's cellular photo chemistry group. "Photoreceptor cells do not regenerate in the eye. When they're dead, they're dead for good."

However, the researchers found a molecule called alpha-tocopherol, which comes from Vitamin E, can help prevent cell death, according to Futurism.

The researchers plan to review how light from TVs, cellphones and tablet screens affect the eyes as well.

"If you look at the amount of light coming out of your cellphone, it's not great but it seems tolerable," said Dr. John Payton, visiting assistant professor in the UT Department of Chemistry and Biochemistry. "Some cellphone companies are adding blue-light filters to the screens, and I think that is a good idea."

Indeed, Apple released a Night Shift mode two years ago to help quell blue lights strain on the eyes, according to The Verge. The screen will dim into a warmer, orange light that will cause less stress on the eyes.