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<title>What is Blue Light?</title>
<meta name='description' content='What is Blue Light? As laptops, tablets and smartphones have become more and more integrated into our daily lives, it makes sense to be aware of any potential negative effects they might have on our health. You’ve likely heard the term ‘blue light’ being bandied about, with suggestions it contributes to all kinds of na' /> 
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		"name": "What is Blue Light?",
		"headline": "What is Blue Light?",
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				"datePublished": "2019-10-03 11:28:28 +0800",
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				"description": "\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\nWhat is Blue Light?\n\n\nAs laptops, tablets and smartphones have become more and more integrated into our daily lives, it makes sense to be aware of any potential negative effects they might have on our health. You’ve likely heard the term ‘blue light’ being bandied about, with suggestions it contributes to all kinds of nasties; from headaches and eye strain to straight-up insomnia. But - we hear you ask - what exactly is blue light, and how is it connected to our use of digital devices? Say no more, as we’ve got the lowdown…\n\nThe Light Spectrum\nTo understand blue light and its various effects, we need to take a look at the bigger picture, also known as the ‘electromagnetic spectrum’. When you step outside into sunshine (rare enough in Ireland, we know), you’re actually basking in a whole host of electromagnetic particles, all of which travel in waves. Some of these waves are visible to the human eye, others - like the ultra-violet or UV rays that tan or burn our skin - aren’t. These waves also vary in terms of their length and strength, as well as how much energy they emit, with shorter wavelengths emitting higher energy. The electromagnetic spectrum is made up of red, orange, yellow, green and blue light, with blue being both visible to the human eye and emitting a high amount of energy. Therefore it’s known as HEV (high-energy visible) light..... READ MOREMore information from ambreyewear-\n\nRetinaGuard Anti Blue Light Tempered Glass Screen Protectors :\n\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 \n\n\n\n\n\n\n",
				"articleBody": "\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\nWhat is Blue Light?\n\n\nAs laptops, tablets and smartphones have become more and more integrated into our daily lives, it makes sense to be aware of any potential negative effects they might have on our health. You’ve likely heard the term ‘blue light’ being bandied about, with suggestions it contributes to all kinds of nasties; from headaches and eye strain to straight-up insomnia. But - we hear you ask - what exactly is blue light, and how is it connected to our use of digital devices? Say no more, as we’ve got the lowdown…\n\nThe Light Spectrum\nTo understand blue light and its various effects, we need to take a look at the bigger picture, also known as the ‘electromagnetic spectrum’. When you step outside into sunshine (rare enough in Ireland, we know), you’re actually basking in a whole host of electromagnetic particles, all of which travel in waves. Some of these waves are visible to the human eye, others - like the ultra-violet or UV rays that tan or burn our skin - aren’t. These waves also vary in terms of their length and strength, as well as how much energy they emit, with shorter wavelengths emitting higher energy. The electromagnetic spectrum is made up of red, orange, yellow, green and blue light, with blue being both visible to the human eye and emitting a high amount of energy. Therefore it’s known as HEV (high-energy visible) light..... READ MOREMore information from ambreyewear-\n\nRetinaGuard Anti Blue Light Tempered Glass Screen Protectors :\n\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 \n\n\n\n\n\n\n"
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      --shopify-accelerated-checkout-button-block-size,
      54px
    ),
    55px
  );
  --wallet-button-width-horizontal: 150px;
  --wallet-button-width-vertical: 100%;
  --wallet-button-border-radius: var(
    --shopify-accelerated-checkout-button-border-radius,
    4px
  );
  --wallet-grid-margin-horizontal: 0 -5px -5px -5px;
  --wallet-button-container-margin-horizontal: 0 5px 5px;
  --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">October 03 2019</p>
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      <h1 class="title"><a href="/blogs/news/what-is-blue-light">What is Blue Light?</a></h1>
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        Written by Heidi Green - October 03 2019
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<p>As laptops, tablets and smartphones have become more and more integrated into our daily lives, it makes sense to be aware of any potential negative effects they might have on our health. You’ve likely heard the term ‘blue light’ being bandied about, with suggestions it contributes to all kinds of nasties; from headaches and eye strain to straight-up insomnia. But - we hear you ask - what exactly is blue light, and how is it connected to our use of digital devices? Say no more, as we’ve got the lowdown…</p>
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<br>The Light Spectrum</a>
<div class="description">To understand blue light and its various effects, we need to take a look at the bigger picture, also known as the ‘electromagnetic spectrum’. When you step outside into sunshine (rare enough in Ireland, we know), you’re actually basking in a whole host of electromagnetic particles, all of which travel in waves. Some of these waves are visible to the human eye, others - like the ultra-violet or UV rays that tan or burn our skin - aren’t. These waves also vary in terms of their length and strength, as well as how much energy they emit, with shorter wavelengths emitting higher energy. The electromagnetic spectrum is made up of red, orange, yellow, green and blue light, with blue being both visible to the human eye<span> </span><i>and</i><span> </span>emitting a high amount of energy. Therefore it’s known as HEV (high-energy visible) light..... <span style="color: #0000ff;"><a href="https://ambreyewear.com/pages/blue-light" target="_blank" rel="noopener noreferrer" style="color: #0000ff;">READ MORE</a><br><br><a href="https://ambreyewear.com/pages/blue-light" target="_blank" rel="noopener noreferrer" style="color: #0000ff;">More information from ambreyewear</a><br><br><span style="color: #000000;">-</span></span>
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<h3 class="page-title" itemprop="name"><span style="color: #0000ff;"><a href="https://www.iflscience.com/health-and-medicine/nighttime-exposure-to-blue-light-could-encourage-sugary-snack-consumption-in-rats/?fbclid=IwAR0sd0okS2e1QzTeYdMW_rpfazJ_r7AeL7DkQQUOdvXx2vemXwelK8UGlac" target="_blank" rel="noopener noreferrer" style="color: #0000ff;"><em><strong></strong></em></a><em><strong><a href="https://retinaguardstore.com/collections/iphone-8-iphone-8-plus-iphone-x/products/copy-of-anti-blue-light-tempered-glass-screen-protector-iphone-8-iphone-8-plus" target="_blank" rel="noopener noreferrer" style="color: #0000ff;">iPhone XS</a> / <a href="https://retinaguardstore.com/collections/pet-iphone-x-xr-xs-xs-max/products/anti-blue-light-screen-protector-iphone-xs-max" target="_blank" rel="noopener noreferrer" style="color: #0000ff;">iPhone XS MAX </a>/ <a href="https://retinaguardstore.com/collections/pet-iphone-x-xr-xs-xs-max/products/anti-blue-light-screen-protector-iphone-xr" target="_blank" rel="noopener noreferrer" style="color: #0000ff;">iPhone XR</a> / </strong></em><em><strong><a href="https://retinaguardstore.com/collections/pet-iphone-x-xr-xs-xs-max/products/anti-blue-light-screen-protector-iphone-x" target="_blank" rel="noopener noreferrer" style="color: #0000ff;">iPhone X</a></strong></em></span></h3>
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<h3><span style="color: #0000ff;"><em><strong><a href="https://retinaguardstore.com/collections/anti-blue-light-tempered-glass-screen-protector-for-ipad-pro" target="_blank" rel="noopener noreferrer" style="color: #0000ff;">iPad pro</a>．<a href="https://retinaguardstore.com/collections/anti-blue-light-tempered-glass-screen-protector-for-ipad-air-air2" target="_blank" rel="noopener noreferrer" style="color: #0000ff;">iPad air</a>． <a href="https://retinaguardstore.com/collections/anti-blue-light-tempered-glass-screen-protector-for-ipad-mini-mini2-mini3-mini4" target="_blank" rel="noopener noreferrer" style="color: #0000ff;">iPad mini</a></strong></em></span></h3>
<h3><span style="color: #0000ff;"><em><b><a href="https://retinaguardstore.com/collections/macbook-pro-15-13" target="_blank" rel="noopener noreferrer" style="color: #0000ff;">Macbook Pro</a>．<a href="https://retinaguardstore.com/collections/macbook-air/products/anti-blue-light-screen-protector-macbook-air-13-2010-2015" target="_blank" rel="noopener noreferrer" style="color: #0000ff;">Macbook Air</a>．<a href="https://retinaguardstore.com/collections/imac-21-5/products/anti-blue-light-screen-guard-protector-imac" target="_blank" rel="noopener noreferrer" style="color: #0000ff;">iMac</a></b></em></span></h3>
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