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<title>Blue light has a dark side</title>
<meta name='description' content='Blue light has a dark side What is blue light? The effect blue light has on your sleep and more. Updated: July 7, 2020 Published: May, 2012 Although it is environmentally friendly, blue light can affect your sleep and potentially cause disease. Until the advent of artificial lighting, the sun was the major source of li' /> 
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		"name": "Blue light has a dark side",
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				"description": "\nBlue light has a dark side\n\nWhat is blue light? The effect blue light has on your sleep and more.\n\n\nUpdated: July 7, 2020\nPublished: May, 2012\n\nAlthough it is environmentally friendly, blue light can affect your sleep and potentially cause disease. Until the advent of artificial lighting, the sun was the major source of lighting, and people spent their evenings in (relative) darkness. Now, in much of the world, evenings are illuminated, and we take our easy access to all those lumens pretty much for granted.\nBut we may be paying a price for basking in all that light. At night, light throws the body's biological clock—the circadian rhythm—out of whack. Sleep suffers. Worse, research shows that it may contribute to the causation of cancer, diabetes, heart disease, and obesity......READ MORE\nMore information from www.health.harvard.edu\n\nRetinaGuard Anti Blue Light Tempered Glass Screen Protectors :\niPhone SE 2020 \niPhone 11 \/ iPhone 11 Pro \/ iPhone 11 Pro Max\niPhone XS \/ iPhone XS MAX \/ iPhone XR \/ iPhone X\niPhone 8 \/ iPhone 8 plus\niPhone 7 \/ iPhone 7 plus\niPhone 6 \/ iPhone 6 plus\niPad pro．iPad air． iPad mini\nMacbook Pro．Macbook Air．iMac\nSAMSUNG．HTC．SONY．ASUS．LG．Xiaomi．VEHICLES\n",
				"articleBody": "\nBlue light has a dark side\n\nWhat is blue light? The effect blue light has on your sleep and more.\n\n\nUpdated: July 7, 2020\nPublished: May, 2012\n\nAlthough it is environmentally friendly, blue light can affect your sleep and potentially cause disease. Until the advent of artificial lighting, the sun was the major source of lighting, and people spent their evenings in (relative) darkness. Now, in much of the world, evenings are illuminated, and we take our easy access to all those lumens pretty much for granted.\nBut we may be paying a price for basking in all that light. At night, light throws the body's biological clock—the circadian rhythm—out of whack. Sleep suffers. Worse, research shows that it may contribute to the causation of cancer, diabetes, heart disease, and obesity......READ MORE\nMore information from www.health.harvard.edu\n\nRetinaGuard Anti Blue Light Tempered Glass Screen Protectors :\niPhone SE 2020 \niPhone 11 \/ iPhone 11 Pro \/ iPhone 11 Pro Max\niPhone XS \/ iPhone XS MAX \/ iPhone XR \/ iPhone X\niPhone 8 \/ iPhone 8 plus\niPhone 7 \/ iPhone 7 plus\niPhone 6 \/ iPhone 6 plus\niPad pro．iPad air． iPad mini\nMacbook Pro．Macbook Air．iMac\nSAMSUNG．HTC．SONY．ASUS．LG．Xiaomi．VEHICLES\n"
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  --wallet-button-container-margin-vertical: var(--shopify-accelerated-checkout-row-gap, 8px) 0 0;
}

@keyframes acceleratedCheckoutLoadingSkeleton {
  50% {opacity: var(--shopify-accelerated-checkout-skeleton-animation-opacity-start, 1);}
  75% {opacity: var(--shopify-accelerated-checkout-skeleton-animation-opacity-end, 0.5);}
  100% {opacity: var(--shopify-accelerated-checkout-skeleton-animation-opacity-start, 1);}
}

.wallet-cart-button__skeleton {
  animation: acceleratedCheckoutLoadingSkeleton var(--shopify-accelerated-checkout-skeleton-animation-duration, 4s) var(--shopify-accelerated-checkout-skeleton-animation-timing-function, ease) infinite;
  animation-delay: -0.168s;
  background-color: var(--shopify-accelerated-checkout-skeleton-background-color, #dedede);
  box-sizing: border-box;
  text-decoration: none !important;
}

.wallet-cart-grid {
  margin: var(--wallet-grid-margin-horizontal);
  padding: 0;
  display: flex;
  flex-direction: row;
  justify-content: var(--shopify-accelerated-checkout-inline-alignment, start);
  gap: 0 !important;
}

.wallet-cart-grid--skeleton {
  justify-content: var(--shopify-accelerated-checkout-inline-alignment, inherit);
}

.wallet-cart-button-container {
  position: relative;
  margin: var(--wallet-button-container-margin-horizontal);
}

.wallet-cart-button-container,
.wallet-cart-button {
  width: var(--wallet-button-width-horizontal);
  height: var(--wallet-button-height-horizontal);
  border-radius: var(--wallet-button-border-radius);
  list-style-type: none !important;
  text-align: center;
  flex-shrink: 0;
  flex-grow: 0;
}

.additional-checkout-buttons--vertical .wallet-cart-grid {
  justify-content: start;
  flex-direction: column;
  margin: 0;
}
.additional-checkout-buttons--vertical .wallet-cart-grid .wallet-cart-button-container {
  width: var(--wallet-button-width-vertical);
  height: var(--wallet-button-height-vertical);
  margin: var(--wallet-button-container-margin-vertical);
}
.additional-checkout-buttons--vertical .wallet-cart-grid .wallet-cart-button-container:first-child {
  margin-top: 0;
}
.additional-checkout-buttons--vertical .wallet-cart-grid .wallet-cart-button {
  width: var(--wallet-button-width-vertical);
  height: var(--wallet-button-height-vertical);
}

.additional-checkout-buttons--horizontal .wallet-cart-grid .wallet-cart-button-container,
.additional-checkout-buttons--horizontal .wallet-cart-grid .wallet-cart-button {
  width: var(--wallet-button-width-horizontal) !important;
  height: var(--wallet-button-height-horizontal) !important;
  border-radius: var(--wallet-button-border-radius) !important;
}

@container dcc (width >= 150px) and (width <= 500px) {
  .wallet-cart-grid:has(>.wallet-cart-button-container:nth-of-type(1)).wallet-cart-grid:not(:has(>.wallet-cart-button-container:nth-of-type(2))) {
    justify-content: start;
    flex-direction: column;
    margin: 0;
  }
  .wallet-cart-grid:has(>.wallet-cart-button-container:nth-of-type(1)).wallet-cart-grid:not(:has(>.wallet-cart-button-container:nth-of-type(2))) .wallet-cart-button-container {
    width: var(--wallet-button-width-vertical);
    height: var(--wallet-button-height-vertical);
    margin: var(--wallet-button-container-margin-vertical);
  }
  .wallet-cart-grid:has(>.wallet-cart-button-container:nth-of-type(1)).wallet-cart-grid:not(:has(>.wallet-cart-button-container:nth-of-type(2))) .wallet-cart-button-container:first-child {
    margin-top: 0;
  }
  .wallet-cart-grid:has(>.wallet-cart-button-container:nth-of-type(1)).wallet-cart-grid:not(:has(>.wallet-cart-button-container:nth-of-type(2))) .wallet-cart-button {
    width: var(--wallet-button-width-vertical);
    height: var(--wallet-button-height-vertical);
  }
}

@container dcc (width <= 310px) {
  .wallet-cart-grid:has(>.wallet-cart-button-container:nth-of-type(2)).wallet-cart-grid:not(:has(>.wallet-cart-button-container:nth-of-type(3))) {
    justify-content: start;
    flex-direction: column;
    margin: 0;
  }
  .wallet-cart-grid:has(>.wallet-cart-button-container:nth-of-type(2)).wallet-cart-grid:not(:has(>.wallet-cart-button-container:nth-of-type(3))) .wallet-cart-button-container {
    width: var(--wallet-button-width-vertical);
    height: var(--wallet-button-height-vertical);
    margin: var(--wallet-button-container-margin-vertical);
  }
  .wallet-cart-grid:has(>.wallet-cart-button-container:nth-of-type(2)).wallet-cart-grid:not(:has(>.wallet-cart-button-container:nth-of-type(3))) .wallet-cart-button-container:first-child {
    margin-top: 0;
  }
  .wallet-cart-grid:has(>.wallet-cart-button-container:nth-of-type(2)).wallet-cart-grid:not(:has(>.wallet-cart-button-container:nth-of-type(3))) .wallet-cart-button {
    width: var(--wallet-button-width-vertical);
    height: var(--wallet-button-height-vertical);
  }
}

@container dcc (width <= 470px) {
  .wallet-cart-grid:has(>.wallet-cart-button-container:nth-of-type(3)).wallet-cart-grid:not(:has(>.wallet-cart-button-container:nth-of-type(4))) {
    justify-content: start;
    flex-direction: column;
    margin: 0;
  }
  .wallet-cart-grid:has(>.wallet-cart-button-container:nth-of-type(3)).wallet-cart-grid:not(:has(>.wallet-cart-button-container:nth-of-type(4))) .wallet-cart-button-container {
    width: var(--wallet-button-width-vertical);
    height: var(--wallet-button-height-vertical);
    margin: var(--wallet-button-container-margin-vertical);
  }
  .wallet-cart-grid:has(>.wallet-cart-button-container:nth-of-type(3)).wallet-cart-grid:not(:has(>.wallet-cart-button-container:nth-of-type(4))) .wallet-cart-button-container:first-child {
    margin-top: 0;
  }
  .wallet-cart-grid:has(>.wallet-cart-button-container:nth-of-type(3)).wallet-cart-grid:not(:has(>.wallet-cart-button-container:nth-of-type(4))) .wallet-cart-button {
    width: var(--wallet-button-width-vertical);
    height: var(--wallet-button-height-vertical);
  }
}

@container dcc (width <= 630px) {
  .wallet-cart-grid:has(>.wallet-cart-button-container:nth-of-type(4)).wallet-cart-grid:not(:has(>.wallet-cart-button-container:nth-of-type(5))) {
    justify-content: start;
    flex-direction: column;
    margin: 0;
  }
  .wallet-cart-grid:has(>.wallet-cart-button-container:nth-of-type(4)).wallet-cart-grid:not(:has(>.wallet-cart-button-container:nth-of-type(5))) .wallet-cart-button-container {
    width: var(--wallet-button-width-vertical);
    height: var(--wallet-button-height-vertical);
    margin: var(--wallet-button-container-margin-vertical);
  }
  .wallet-cart-grid:has(>.wallet-cart-button-container:nth-of-type(4)).wallet-cart-grid:not(:has(>.wallet-cart-button-container:nth-of-type(5))) .wallet-cart-button-container:first-child {
    margin-top: 0;
  }
  .wallet-cart-grid:has(>.wallet-cart-button-container:nth-of-type(4)).wallet-cart-grid:not(:has(>.wallet-cart-button-container:nth-of-type(5))) .wallet-cart-button {
    width: var(--wallet-button-width-vertical);
    height: var(--wallet-button-height-vertical);
  }
}

@container dcc (width <= 790px) {
  .wallet-cart-grid:has(>.wallet-cart-button-container:nth-of-type(5)).wallet-cart-grid:not(:has(>.wallet-cart-button-container:nth-of-type(6))) {
    justify-content: start;
    flex-direction: column;
    margin: 0;
  }
  .wallet-cart-grid:has(>.wallet-cart-button-container:nth-of-type(5)).wallet-cart-grid:not(:has(>.wallet-cart-button-container:nth-of-type(6))) .wallet-cart-button-container {
    width: var(--wallet-button-width-vertical);
    height: var(--wallet-button-height-vertical);
    margin: var(--wallet-button-container-margin-vertical);
  }
  .wallet-cart-grid:has(>.wallet-cart-button-container:nth-of-type(5)).wallet-cart-grid:not(:has(>.wallet-cart-button-container:nth-of-type(6))) .wallet-cart-button-container:first-child {
    margin-top: 0;
  }
  .wallet-cart-grid:has(>.wallet-cart-button-container:nth-of-type(5)).wallet-cart-grid:not(:has(>.wallet-cart-button-container:nth-of-type(6))) .wallet-cart-button {
    width: var(--wallet-button-width-vertical);
    height: var(--wallet-button-height-vertical);
  }
}

.wallet-cart-grid:has(>.wallet-cart-button-container:nth-of-type(6)) {
  justify-content: start;
  flex-direction: column;
  margin: 0;
}
.wallet-cart-grid:has(>.wallet-cart-button-container:nth-of-type(6)) .wallet-cart-button-container {
  width: var(--wallet-button-width-vertical);
  height: var(--wallet-button-height-vertical);
  margin: var(--wallet-button-container-margin-vertical);
}
.wallet-cart-grid:has(>.wallet-cart-button-container:nth-of-type(6)) .wallet-cart-button-container:first-child {
  margin-top: 0;
}
.wallet-cart-grid:has(>.wallet-cart-button-container:nth-of-type(6)) .wallet-cart-button {
  width: var(--wallet-button-width-vertical);
  height: var(--wallet-button-height-vertical);
}

@media screen and (max-width: 750px) {
  .wallet-cart-grid {
    justify-content: start;
    flex-direction: column;
    max-width: none;
    margin: 0;
  }
  .wallet-cart-grid .wallet-cart-button-container {
    max-width: none;
    width: var(--wallet-button-width-vertical);
    height: var(--wallet-button-height-vertical);
    margin: var(--wallet-button-container-margin-vertical);
  }
  .wallet-cart-grid .wallet-cart-button-container:first-child {
    margin-top: 0;
  }
  .wallet-cart-grid .wallet-cart-button {
    width: var(--wallet-button-width-vertical);
    height: var(--wallet-button-height-vertical);
  }
}

@supports (not (container-type: inline-size)) or (not (selector(:has(*)))) {
  .wallet-cart-grid {
    justify-content: start;
    flex-direction: column;
    margin: 0;
  }
  .wallet-cart-button-container {
    width: var(--wallet-button-width-vertical);
    height: var(--wallet-button-height-vertical);
    margin: var(--wallet-button-container-margin-vertical);
  }
  .wallet-cart-button-container:first-child {
    margin-top: 0;
  }
  .wallet-cart-grid .wallet-cart-button {
    width: var(--wallet-button-width-vertical);
    height: var(--wallet-button-height-vertical);
  }
}

        #shopify-buyer-consent {
  margin-top: 1em;
  display: inline-block;
  width: 100%;
}

#shopify-buyer-consent.hidden {
  display: none;
}

#shopify-subscription-policy-button {
  background: none;
  border: none;
  padding: 0;
  text-decoration: underline;
  font-size: inherit;
  cursor: pointer;
}

#shopify-subscription-policy-button::before {
  box-shadow: none;
}

      </style>

<style id="shopify-accelerated-checkout-cart-grid-with-margin-top">.additional-checkout-buttons--vertical .wallet-cart-grid .wallet-cart-button-container:first-child {
  margin-top: 8px;
}


@container dcc (width >= 150px) and (width <= 500px) {
  .wallet-cart-grid:has(>.wallet-cart-button-container:nth-of-type(1)).wallet-cart-grid:not(:has(>.wallet-cart-button-container:nth-of-type(2))) .wallet-cart-button-container:first-child {
    margin-top: 8px;
  }
}

@container dcc (width <= 310px) {
  .wallet-cart-grid:has(>.wallet-cart-button-container:nth-of-type(2)).wallet-cart-grid:not(:has(>.wallet-cart-button-container:nth-of-type(3))) .wallet-cart-button-container:first-child {
    margin-top: 8px;
  }
}

@container dcc (width <= 470px) {
  .wallet-cart-grid:has(>.wallet-cart-button-container:nth-of-type(3)).wallet-cart-grid:not(:has(>.wallet-cart-button-container:nth-of-type(4))) .wallet-cart-button-container:first-child {
    margin-top: 8px;
  }
}

@container dcc (width <= 630px) {
  .wallet-cart-grid:has(>.wallet-cart-button-container:nth-of-type(4)).wallet-cart-grid:not(:has(>.wallet-cart-button-container:nth-of-type(5))) .wallet-cart-button-container:first-child {
    margin-top: 8px;
  }
}

@container dcc (width <= 790px) {
  .wallet-cart-grid:has(>.wallet-cart-button-container:nth-of-type(5)).wallet-cart-grid:not(:has(>.wallet-cart-button-container:nth-of-type(6))) .wallet-cart-button-container:first-child {
    margin-top: 8px;
  }
}

.wallet-cart-grid:has(>.wallet-cart-button-container:nth-of-type(6)) .wallet-cart-button-container:first-child {
  margin-top: 8px;
}

@media screen and (max-width: 750px) {
  .wallet-cart-grid .wallet-cart-button-container:first-child {
    margin-top: 8px;
  }
}

@supports (not (container-type: inline-size)) or (not (selector(:has(*)))) {
  .wallet-cart-button-container:first-child {
    margin-top: 8px;
  }
}
</style>
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        <p class="content">August 03 2020</p>
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        <p class="content">keiko lin</p>
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      <h1 class="title"><a href="/blogs/news/blue-light-has-a-dark-side-2">Blue light has a dark side</a></h1>
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        Written by keiko lin - August 03 2020
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<h1 class="p-name entry-title">Blue light has a dark side</h1>
<div class="e-content entry-content">
<h2>What is blue light? The effect blue light has on your sleep and more.</h2>
<p><img alt="blue light at night" src="https://www.health.harvard.edu/media/content/images/NightScreendreamstime_m_40479813.jpg"></p>
<div class="date-published-meta">
<time class="dt-published" datetime="2020-07-07T00:00:00-04:00">Updated: July 7, 2020</time>
<div>Published: May, 2012</div>
</div>
<p>Although it is environmentally friendly, blue light can affect your sleep and potentially cause disease. Until the advent of artificial lighting, the sun was the major source of lighting, and people spent their evenings in (relative) darkness. Now, in much of the world, evenings are illuminated, and we take our easy access to all those lumens pretty much for granted.</p>
<p>But we may be paying a price for basking in all that light. At night, light throws the body's biological clock—the<span> </span><a href="https://www.health.harvard.edu/blog/why-your-sleep-and-wake-cycles-affect-your-mood-2020051319792">circadian rhythm</a>—out of whack. Sleep suffers. Worse, research shows that it<span> </span><em>may</em><span> </span>contribute to the causation of cancer, diabetes, heart disease, and obesity......<a href="https://www.health.harvard.edu/staying-healthy/blue-light-has-a-dark-side" target="_blank" rel="noopener noreferrer">READ MORE</a></p>
<p>More information from <a href="https://www.health.harvard.edu/staying-healthy/blue-light-has-a-dark-side" target="_blank" rel="noopener noreferrer">www.health.harvard.edu</a></p>
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