{"id":55669,"date":"2020-01-26T13:45:50","date_gmt":"2020-01-26T13:45:50","guid":{"rendered":"https:\/\/g1.redseafish.com\/?p=55669"},"modified":"2021-07-14T11:08:52","modified_gmt":"2021-07-14T11:08:52","slug":"light-intensity-photoperiod-relationship","status":"publish","type":"post","link":"https:\/\/g1.redseafish.com\/light-intensity-photoperiod-relationship\/","title":{"rendered":"Light intensity &#038; photoperiod relationship"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"55669\" class=\"elementor elementor-55669\" data-elementor-settings=\"[]\">\n\t\t\t\t\t\t<div class=\"elementor-inner\">\n\t\t\t\t\t\t\t<div class=\"elementor-section-wrap\">\n\t\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-3f1b4dfd elementor-section-height-min-height elementor-section-boxed elementor-section-height-default elementor-section-items-middle\" data-id=\"3f1b4dfd\" data-element_type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t\t<div class=\"elementor-background-overlay\"><\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t\t\t<div class=\"elementor-row\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-cc36f60\" data-id=\"cc36f60\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-column-wrap\">\n\t\t\t\t\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-42fb330a elementor-reverse-mobile elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"42fb330a\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t\t\t<div class=\"elementor-row\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-6fa71c30\" data-id=\"6fa71c30\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-column-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-30d9adf2 elementor-author-box--layout-image-above elementor-author-box--align-left elementor-widget elementor-widget-author-box\" data-id=\"30d9adf2\" data-element_type=\"widget\" data-widget_type=\"author-box.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-author-box\">\n\t\t\t\t\t\t\t<div  class=\"elementor-author-box__avatar\">\n\t\t\t\t\t<img src=\"https:\/\/g1.redseafish.com\/wp-content\/uploads\/2020\/01\/Sharon2020-286x300.jpg\" alt=\"Sharon Ram\">\n\t\t\t\t<\/div>\n\t\t\t\n\t\t\t<div class=\"elementor-author-box__text\">\n\t\t\t\t\t\t\t\t\t<div >\n\t\t\t\t\t\t<h4 class=\"elementor-author-box__name\">\n\t\t\t\t\t\t\tSharon Ram\t\t\t\t\t\t<\/h4>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-author-box__bio\">\n\t\t\t\t\t\t<p>Red Sea's Chief scientist<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-7090675c\" data-id=\"7090675c\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-column-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-320ba0a8 elementor-widget elementor-widget-post-info\" data-id=\"320ba0a8\" data-element_type=\"widget\" data-widget_type=\"post-info.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<ul class=\"elementor-inline-items elementor-icon-list-items elementor-post-info\">\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item elementor-repeater-item-a475e37 elementor-inline-item\" itemprop=\"datePublished\">\n\t\t\t\t\t\t<a href=\"https:\/\/g1.redseafish.com\/2020\/01\/26\/\">\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t\t<i aria-hidden=\"true\" class=\"fas fa-calendar\"><\/i>\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text elementor-post-info__item elementor-post-info__item--type-date\">\n\t\t\t\t\t\t\t\t\t\tJanuary 26, 2020\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t<\/li>\n\t\t\t\t<li class=\"elementor-icon-list-item elementor-repeater-item-0f61cfc elementor-inline-item\">\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t\t<i aria-hidden=\"true\" class=\"fas fa-stopwatch\"><\/i>\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text elementor-post-info__item elementor-post-info__item--type-custom\">\n\t\t\t\t\t\t\t\t\t\t3 minutes read\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t<\/ul>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-12752bb3 elementor-widget elementor-widget-theme-post-title elementor-page-title elementor-widget-heading\" data-id=\"12752bb3\" data-element_type=\"widget\" data-widget_type=\"theme-post-title.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">Light intensity &#038; photoperiod relationship<\/h1>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5da9888 elementor-widget elementor-widget-text-editor\" data-id=\"5da9888\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t<p class=\"MsoNormal\">Lighting #4 | Red Sea Insights<\/p><p class=\"MsoNormal\">\u00a0<\/p><p>\u00a0<\/p>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-58524dc elementor-widget elementor-widget-text-editor\" data-id=\"58524dc\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t<p class=\"MsoNormal\"><span lang=\"EN-US\">Today I\u2019ll dive deep into light vs. dark period and the relationship between intensity and photoperiod. What\u2019s safe and what\u2019s not?<\/span><\/p><p class=\"MsoNormal\"><span lang=\"EN-US\">\u00a0<\/span><\/p><p class=\"MsoNormal\"><span lang=\"EN-US\">In the previous blog, I wrote about\u00a0<span style=\"text-decoration: underline;\"><a href=\"https:\/\/g1.redseafish.com\/?p=55660\" target=\"_blank\" rel=\"noopener\">the required light spectrum and intensity<\/a><\/span>\u00a0<\/span>for your reef aquarium. Today I\u2019ll explain about photoperiod, which is the third parameter of REEF-SPEC lighting. I\u2019ll explore the relationship between photoperiod and light intensity and how it affects your reef.<\/p><p class=\"MsoNormal\"><span lang=\"EN-US\">\u00a0<\/span><\/p><p class=\"MsoNormal\"><span lang=\"EN-US\">Let\u2019s start with the basics:\u00a0<\/span><\/p><p class=\"MsoNormal\"><span lang=\"EN-US\">Like every photosynthetic organism corals need light, but there\u2019s only so much they can take. That means that the duration of the daily photoperiod is very important. Even the optimal amount of daily photosynthetic activity generates residual energy inside the coral that must be released, so they need a period of darkness, just as much as they need the light.<\/span><\/p><p class=\"MsoNormal\"><span lang=\"EN-US\">\u00a0<\/span><\/p><p class=\"MsoNormal\"><span lang=\"EN-US\">Our research has shown that to get optimal coral growth and coloration, light and dark periods should be about the same. Also, the intensity and photoperiod are inversely proportional, which means if one goes up, the other must come down and vice-versa. So, for a 24-hour daily cycle, we recommend approximately 12 hours of light with an average PUR intensity of between 100 to 450 micromoles, followed by 12 hours of darkness. <\/span><\/p><p class=\"MsoNormal\"><span lang=\"EN-US\">\u00a0<\/span><\/p><p class=\"MsoNormal\"><span lang=\"EN-US\">Moonlight should also be taken into account as part of the total daily light energy and therefore should either be at very low levels or be included as part of the photoperiod. Our research did not only give us these guidelines, but it also provided an insight into what is going on inside the coral.<\/span><\/p><p class=\"MsoNormal\"><span lang=\"EN-US\">\u00a0<\/span><\/p><p class=\"MsoNormal\"><span lang=\"EN-US\">We all instinctively understand that not enough light will limit coral vitality, but what about too much of it? Overexposure to light, meaning exceeding the maximum amount of energy that the corals can handle, has undesired effects. We\u2019re talking about things like the formation of free oxygen radicals and the conversion of unutilized light energy to heat, both of which cause the accumulation of toxins in the coral tissues, and when they occur together, they make matters worse.<\/span><\/p><p class=\"MsoNormal\"><span lang=\"EN-US\">\u00a0<\/span><\/p><p class=\"MsoNormal\"><span lang=\"EN-US\">What you\u2019ll see is the polyps and soft tissue retracting into the skeleton of the corals to reduce their exposure to light or paling of the soft tissue. These are the first signs of photoinhibition, and it\u2019s the coral\u2019s auto-protection mechanism kicking in. Fortunately, these effects are reversible, but prolonged overexposure may cause long-term damage.<\/span><\/p><p class=\"MsoNormal\"><span lang=\"EN-US\">\u00a0<\/span><\/p><p class=\"MsoNormal\"><span lang=\"EN-US\">If you don\u2019t have <u><a href=\"https:\/\/g1.redseafish.com\/?p=55652\" target=\"_blank\" rel=\"noopener\">REEF-SPEC lighting<\/a><\/u>, then when setting up your aquarium lighting watch out for a few of the settings that can cause photoinhibition:<\/span><\/p><p class=\"MsoNormal\"><span style=\"text-indent: -18pt;\">\u00a0<\/span><\/p><ul><li><span style=\"text-indent: -18pt;\">The wrong light spectrum \u2013 Set your lighting as close as possible to the coral PUR spectrum.<\/span><\/li><li><span style=\"text-indent: -18pt;\">The right spectrum at a too high intensity \u2013 Avoid hotspots of over 450 PUR at the water surface.<\/span><\/li><li><span style=\"text-indent: -18pt;\">The right intensity for too long a period \u2013 Apply the recommended photoperiod guidelines of about 12 hours of light and dark per day.<\/span><\/li><\/ul><p class=\"MsoNormal\"><span lang=\"EN-US\">\u00a0<\/span><\/p><p class=\"MsoNormal\"><span lang=\"EN-US\">So, to recap: Like <a href=\"https:\/\/g1.redseafish.com\/?p=55660\" target=\"_blank\" rel=\"noopener\"><u>spectrum and intensity<\/u><\/a>, the photoperiod has a significant impact on the health and vitality of your corals.\u00a0<\/span><\/p><p class=\"MsoNormal\"><span lang=\"EN-US\">\u00a0<\/span><\/p><p class=\"MsoNormal\"><span lang=\"EN-US\">And a quick tip, if you want to enjoy your reef a bit longer over the weekends, no problem, just increase the photoperiod but make sure you compensate by reducing the intensity for a few hours during the day.<\/span><\/p><p class=\"MsoNormal\"><span lang=\"EN-US\">\u00a0<\/span><\/p><p class=\"MsoNormal\"><span lang=\"EN-US\">Now, if you choose to use <u><a href=\"https:\/\/g1.redseafish.com\/hardware\/reefled\/\" target=\"_blank\" rel=\"noopener\">Red Sea\u2019s ReefLEDs<\/a>\u00a0<\/u>you don\u2019t have to worry about getting it right, they\u2019ve already been designed according to the spectrum and intensity guidelines we discussed in this article series.\u00a0<\/span><\/p><p class=\"MsoNormal\"><span lang=\"EN-US\">\u00a0<\/span><\/p><p class=\"MsoNormal\"><span lang=\"EN-US\">The photoperiod is up to you, and don\u2019t worry about overdoing it, our ReefBeat App will let you know if you are about to go over the edge.<\/span><\/p><p style=\"color: #565565; font-family: 'Open Sans', sans-serif; font-size: 18px;\">\u00a0<\/p>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2bcbd6ce elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"2bcbd6ce\" data-element_type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-638bfa9b elementor-widget elementor-widget-heading\" data-id=\"638bfa9b\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">More to explore<\/h4>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1799a8ec elementor-posts--align-left elementor-grid-3 elementor-grid-tablet-2 elementor-grid-mobile-1 elementor-posts--thumbnail-top elementor-card-shadow-yes elementor-posts__hover-gradient elementor-invisible elementor-widget elementor-widget-posts\" data-id=\"1799a8ec\" data-element_type=\"widget\" data-settings=\"{&quot;cards_row_gap&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:16,&quot;sizes&quot;:[]},&quot;_animation&quot;:&quot;fadeIn&quot;,&quot;cards_columns&quot;:&quot;3&quot;,&quot;cards_columns_tablet&quot;:&quot;2&quot;,&quot;cards_columns_mobile&quot;:&quot;1&quot;,&quot;cards_row_gap_tablet&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;cards_row_gap_mobile&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]}}\" data-widget_type=\"posts.cards\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-posts-container elementor-posts elementor-posts--skin-cards elementor-grid\">\n\t\t\t\t<article class=\"elementor-post elementor-grid-item post-55669 post type-post status-publish format-standard has-post-thumbnail hentry category-reef-lighting\">\n\t\t\t<div class=\"elementor-post__card\">\n\t\t\t\t<a class=\"elementor-post__thumbnail__link\" href=\"https:\/\/g1.redseafish.com\/light-intensity-photoperiod-relationship\/\" ><div class=\"elementor-post__thumbnail\"><img width=\"1024\" height=\"575\" src=\"https:\/\/g1.redseafish.com\/wp-content\/uploads\/2020\/01\/light6-1024x575.png\" class=\"attachment-large size-large\" alt=\"\" loading=\"lazy\" srcset=\"https:\/\/g1.redseafish.com\/wp-content\/uploads\/2020\/01\/light6-1024x575.png 1024w, https:\/\/g1.redseafish.com\/wp-content\/uploads\/2020\/01\/light6-300x168.png 300w, https:\/\/g1.redseafish.com\/wp-content\/uploads\/2020\/01\/light6-768x431.png 768w, https:\/\/g1.redseafish.com\/wp-content\/uploads\/2020\/01\/light6-e1582529352412.png 1000w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/div><\/a>\n\t\t\t\t<div class=\"elementor-post__badge\">Reef lighting<\/div>\n\t\t\t\t<div class=\"elementor-post__text\">\n\t\t\t\t<h3 class=\"elementor-post__title\">\n\t\t\t<a href=\"https:\/\/g1.redseafish.com\/light-intensity-photoperiod-relationship\/\" >\n\t\t\t\tLight intensity &#038; photoperiod relationship\t\t\t<\/a>\n\t\t<\/h3>\n\t\t\t\t<div class=\"elementor-post__excerpt\">\n\t\t\t<p>Lighting #4<\/p>\n\t\t<\/div>\n\t\t\t\t\t<a class=\"elementor-post__read-more\" href=\"https:\/\/g1.redseafish.com\/light-intensity-photoperiod-relationship\/\" >\n\t\t\t\tRead More \u00bb\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/article>\n\t\t\t\t<article class=\"elementor-post elementor-grid-item post-55660 post type-post status-publish format-standard has-post-thumbnail hentry category-reef-lighting\">\n\t\t\t<div class=\"elementor-post__card\">\n\t\t\t\t<a class=\"elementor-post__thumbnail__link\" href=\"https:\/\/g1.redseafish.com\/busting-light-measurement-myths\/\" ><div class=\"elementor-post__thumbnail\"><img width=\"1024\" height=\"576\" src=\"https:\/\/g1.redseafish.com\/wp-content\/uploads\/2020\/01\/Newsletter-1024x576.png\" class=\"attachment-large size-large\" alt=\"\" loading=\"lazy\" srcset=\"https:\/\/g1.redseafish.com\/wp-content\/uploads\/2020\/01\/Newsletter-1024x576.png 1024w, https:\/\/g1.redseafish.com\/wp-content\/uploads\/2020\/01\/Newsletter-300x169.png 300w, https:\/\/g1.redseafish.com\/wp-content\/uploads\/2020\/01\/Newsletter-768x432.png 768w, https:\/\/g1.redseafish.com\/wp-content\/uploads\/2020\/01\/Newsletter-1536x864.png 1536w, https:\/\/g1.redseafish.com\/wp-content\/uploads\/2020\/01\/Newsletter-e1582529333160.png 1000w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/div><\/a>\n\t\t\t\t<div class=\"elementor-post__badge\">Reef lighting<\/div>\n\t\t\t\t<div class=\"elementor-post__text\">\n\t\t\t\t<h3 class=\"elementor-post__title\">\n\t\t\t<a href=\"https:\/\/g1.redseafish.com\/busting-light-measurement-myths\/\" >\n\t\t\t\tBusting light measurement myths\t\t\t<\/a>\n\t\t<\/h3>\n\t\t\t\t<div class=\"elementor-post__excerpt\">\n\t\t\t<p>Lighting #3<\/p>\n\t\t<\/div>\n\t\t\t\t\t<a class=\"elementor-post__read-more\" href=\"https:\/\/g1.redseafish.com\/busting-light-measurement-myths\/\" >\n\t\t\t\tRead More \u00bb\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/article>\n\t\t\t\t<article class=\"elementor-post elementor-grid-item post-55652 post type-post status-publish format-standard has-post-thumbnail hentry category-reef-lighting\">\n\t\t\t<div class=\"elementor-post__card\">\n\t\t\t\t<a class=\"elementor-post__thumbnail__link\" href=\"https:\/\/g1.redseafish.com\/what-makes-aquarium-lighting-reef-safe\/\" ><div class=\"elementor-post__thumbnail\"><img width=\"1024\" height=\"576\" src=\"https:\/\/g1.redseafish.com\/wp-content\/uploads\/2020\/01\/light-1.jpg-1024x576.png\" class=\"attachment-large size-large\" alt=\"\" loading=\"lazy\" srcset=\"https:\/\/g1.redseafish.com\/wp-content\/uploads\/2020\/01\/light-1.jpg-1024x576.png 1024w, https:\/\/g1.redseafish.com\/wp-content\/uploads\/2020\/01\/light-1.jpg-300x169.png 300w, https:\/\/g1.redseafish.com\/wp-content\/uploads\/2020\/01\/light-1.jpg-768x432.png 768w, https:\/\/g1.redseafish.com\/wp-content\/uploads\/2020\/01\/light-1.jpg-1536x863.png 1536w, https:\/\/g1.redseafish.com\/wp-content\/uploads\/2020\/01\/light-1.jpg.png 1676w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/div><\/a>\n\t\t\t\t<div class=\"elementor-post__badge\">Reef lighting<\/div>\n\t\t\t\t<div class=\"elementor-post__text\">\n\t\t\t\t<h3 class=\"elementor-post__title\">\n\t\t\t<a href=\"https:\/\/g1.redseafish.com\/what-makes-aquarium-lighting-reef-safe\/\" >\n\t\t\t\tWhat makes aquarium lighting reef-safe?\t\t\t<\/a>\n\t\t<\/h3>\n\t\t\t\t<div class=\"elementor-post__excerpt\">\n\t\t\t<p>Lighting #2<\/p>\n\t\t<\/div>\n\t\t\t\t\t<a class=\"elementor-post__read-more\" href=\"https:\/\/g1.redseafish.com\/what-makes-aquarium-lighting-reef-safe\/\" >\n\t\t\t\tRead More \u00bb\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/article>\n\t\t\t\t<\/div>\n\n\n\t\t\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Lighting #4 | Red Sea Insights Today I\u2019ll dive deep into light vs. dark period and the relationship between intensity and photoperiod. What\u2019s safe and what\u2019s not? In the previous blog, I wrote about\u00a0the required light spectrum and intensity\u00a0for your reef aquarium. Today I\u2019ll explain about photoperiod, which is the third parameter of REEF-SPEC lighting. [&hellip;]<\/p>\n","protected":false},"author":11,"featured_media":55938,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"elementor_header_footer","format":"standard","meta":[],"categories":[10],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v18.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<meta name=\"description\" content=\"Corals need light, but there\u2019s only so much they can take. 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